関東化学株式会社 List of Products and Services

We offer solvents specifically designed for "LC/MS" analysis, which is becoming increasingly sensitive. With the proliferation of high-sensitivity mass spectrometers, we have added even more guarantee items compared to the conventional "HLC-SOL" (for HPLC). We also provide high-purity products in ampoules for acids such as formic acid. Additionally, we propose products that contribute to the reliability and workability of LC/MS analysis, such as acetonitrile mixed with formic acid. 【Features】 ■ Conducted LC/MS compatibility tests ■ Followed the conventional HLC-SOL standards ■ Packaging designed to minimize contamination ■ Additional guarantees for organic fluorine compounds (PFOS, PFOA, PFHxS) (acetonitrile, distilled water, methanol) We have added tetrahydrofuran for LC/MS. With relative fluorescence intensity and LC/MS compatibility tests included, we ensure the strictest quality control, allowing you to use it with confidence during GPC/MS analysis. We also have solvents available for HPLC. For more details, please download the catalog or feel free to contact us.

The product "For HPLC (Pharmaceutical Testing)" is based on our unique standards derived from the Japanese Pharmacopoeia (JP) reagent standards, and guarantees compliance with the United States Pharmacopeia (USP) reagent standards and the European Pharmacopoeia (EP) reagent standards. Additionally, we have added JIS special grade specifications. This allows for use in both JIS special grade and liquid chromatography applications, reducing the burden of reagent management and waste reagents. 【Features】 ■ Complies with reagent standards listed in the Japanese Pharmacopoeia, United States Pharmacopeia, and European Pharmacopoeia. ■ Expiration date (year, month, day) is displayed on the label. ■ Test date (year, month, day) is displayed on the certificate of analysis. 【Product Lineup】 ◇ Acetonitrile (compliant with JP, JIS, USP, EP) ◇ Methanol (compliant with JP, JIS, USP, EP) ◇ Tetrahydrofuran (compliant with JP, USP) 【Related Products】 Prepared mobile phases minimize the hassle of reagent management and issues related to contamination. ◇ Acetonitrile/water mixture (4:1) ◇ Acetonitrile/water mixture (3:2) For more details, please download the catalog or feel free to contact us.

Our company offers a series of single-use reagents for pharmaceutical testing in 100 mL packaging. The PIC/S GMP Guidelines Part 1, Chapter 6 states: "Special attention must be paid to the quality of laboratory reagents, test solutions, glassware, reference materials, and culture media. They must be prepared and managed according to the procedures. The level of management should be appropriate to their intended use and the available stability data." It is expected that the management of reagents once opened will be based on stability data after opening. This product is available in small, single-use packaging, which allows for reduced waste and effective use of storage space, and eliminates the need for stability confirmation after opening. There is no concern about cross-contamination, allowing for safe use.

We have prepared convenient pre-made test solutions suitable for drug dissolution and disintegration tests. 【New Product】 -NEW- ◆ Disodium hydrogen phosphate-citrate buffer, pH 6.0 This buffer is prepared according to the methods described in the Japanese Pharmacopoeia for reagents and test solutions. It is used diluted four times in the dissolution test of "Rebamipide Tablets." ◆ Pioglitazone hydrochloride tablet dissolution test solution This dissolution test solution is prepared according to the preparation method described in the dissolution test for the pharmaceutical "Pioglitazone Hydrochloride Tablets" in the Japanese Pharmacopoeia. These tests aim to ensure a certain level of quality for oral solid preparations by testing the dissolution of the main component or the disintegration or resistance of the test solution for oral solid preparations. The dissolution test also aims to prevent significant biological non-equivalence. We offer test solutions prepared at various pH levels in a variety of containers and packaging. They are prepared in accordance with the Japanese Pharmacopoeia, and we can also issue test reports. Please make use of this to reduce the burden of preparation work and improve the efficiency of preparation record management. We also accept requests for test solutions at pH levels not listed, so please feel free to contact us.

"Prepsol" is a solvent for large-scale preparative liquid chromatography. This product is packaged in an 18L container, designed for preparative use, minimizing UV absorption and non-volatile components while considering large-scale applications. Large-scale preparative liquid chromatography using high-speed liquid chromatography is an effective method for the separation and purification of pharmaceuticals and bioactive substances, and industrial applications are also anticipated. Such large-scale HPLC requires inexpensive yet high-quality solvents. We offer "Prepsol" to meet these demands. 【Features】 ■ Minimizes non-volatile components in the solvent ■ Keeps UV absorption blanks low ■ By lowering acidity, it enables the separation of unstable substances that are prone to decomposition by acids 【Product Lineup】 ◇ Acetonitrile ◇ Chloroform ◇ Distilled water ◇ Ethanol (99.5) ◇ Ethyl acetate ◇ Hexane ◇ Methanol Additionally, we have a lineup for HLC-SOL (for HPLC), LC/MS, and pharmaceutical testing. For more details, please download the catalog or feel free to contact us.

"Ion Pair Reagent" is a reagent for HPLC. In chromatographic analysis of samples containing ionic compounds, issues may arise with solute retention and peak shape. In such cases, it is known that adding an ion pair reagent to the mobile phase can improve separation, and it is particularly useful in reverse phase chromatography. When this reagent is added to the mobile phase, ions of opposite charges attract each other to form neutral ion pairs, which suppresses the dissociation of the sample in the mobile phase. Additionally, since the ion pair reagents are bonded with various alkyl groups, the formed ion pairs become more lipophilic, resulting in increased retention on ODS packing materials. We offer a lineup for both basic and acidic samples. If you require more guarantee items for use in pharmaceutical testing, we can provide a quote. Please feel free to consult us. In addition, we handle other HPLC reagents: ◇ Solvent for High-Performance Liquid Chromatography HLC-SOL ◇ For LC/MS ◇ For pharmaceutical testing ◇ Pre-prepared mobile phases (custom orders available) …etc. For more details, please download the catalog or feel free to contact us.

Our "Color Comparison Solution" is prepared by mixing solutions of several inorganic salts, known as "Color Comparison Concentrate," in a specific ratio to achieve the designated color. We have adopted a 100mL low-capacity type suitable for small-scale solution preparation, which eliminates the possibility of contamination. Additionally, the preparation is in accordance with the Japanese Pharmacopoeia, and the label displays the expiration date. The sulfuric acid suitable for the color reaction test is already prepared at the required concentration. This product is diluted to comply with the concentration ranges of the Japanese Pharmacopoeia, United States Pharmacopeia, and JIS (K 0072).

"Ion chromatography reagents" are HPLC reagents. Ion chromatography measures standard substances and actual samples, performing qualitative and quantitative analysis by comparing the peaks of the standard substances with those of the actual samples. Our company offers a variety of ion chromatography reagents. In addition to standard stock solutions and standard solutions, we also provide various mixed standard solutions that are convenient for screening and creating calibration curves. 【Product Lineup】 ◇ 1 mol/L ethylenediamine solution ◇ 500 mg/mL ethylenediamine solution ◇ 1 mol/L nitric acid (1N) ◇ 1 mol/L sodium carbonate solution ◇ 1 mol/L sodium bicarbonate solution ◇ Sodium 4-pyridinecarboxylate ◇ 10 mol/L sulfuric acid (20N) ◇ 1 mol/L tartaric acid solution …etc 【Related Products】 We offer JCSS standard solutions used for tap water quality testing. As a JCSS registered business, we provide various standard solutions for water quality testing based on the measurement law traceability system. Please use them together. For more details, please download the catalog or feel free to contact us.

In the general tests for pharmaceuticals described in the Japanese Pharmacopoeia (JP), a high-grade quality as specified by JIS standards is often required for analytical reagents. On the other hand, representative pharmacopoeias from overseas, such as the United States Pharmacopeia (USP) and the European Pharmacopoeia (EP), also establish their own quality standards for analytical reagents, similar to JP. This product guarantees a quality that complies not only with the special grade standards but also with the reagent standards set by USP and EP. It is a product that is frequently used as an analytical reagent and is suitable for pharmaceutical tests specified by JP, USP, and EP.

"Premix products" are pre-prepared elution liquids that mix high-purity formic acid or trifluoroacetic acid for LC/MS grade. This minimizes the hassle of preparation and the issues related to contamination in the working environment. 【Product Lineup】 0.1% (v/v) Formic Acid - Acetonitrile 0.1% (v/v) Formic Acid - Distilled Water 0.1% (v/v) Trifluoroacetic Acid - Acetonitrile 0.1% (v/v) Trifluoroacetic Acid - Distilled Water We can also prepare solutions in the desired composition ratio upon request. We can accommodate salt dissolution and scale-up. 【Basic Specifications】 Solvent Type: Generally prepared from HPLC and LC/MS standard products, but we also accept inquiries regarding buffer solutions. Container: Glass container Main Applications: Elution liquids for HPLC, LC/MS, pretreatment, etc. Standard Items: Primarily density only (as a guideline for composition ratio). We also accept inquiries regarding specifications other than density (metal impurities, UV guarantees, etc.). 【Features】 ■ Reduced burden of reagent management Exclusion from toxic and hazardous substances, lowering the hazardous material classification. ■ Reduction of waste reagents ■ Improved reproducibility For more details, please download the catalog or feel free to contact us.

"Sphere-shaped silica gel" is a packing material for chromatography. Sphere-shaped packing materials excel in gel settling compared to crushed forms, making it possible to create a uniform packing bed. It is suitable for the purification of pharmaceutical raw materials, high-value organic compounds, and organic synthesis products. In addition to unmodified silica gel, we also offer types of silica gel that have been chemically modified with functional groups. Please select the most suitable gel for various separation and purification processes. 【Features】 ■ pH of Silica Gel Pure silica gel (SiO2) is widely known to exhibit weak acidity due to its surface structure, but depending on the properties of the sample, such as unstable substances under acidic conditions, pure silica gel may not be suitable for separation. We provide pH-adjusted products (Silica Gel 60N) to be used for the separation of a wide range of compounds. ■ Chemically Modified Silica Gel We offer types modified with aminopropyl groups and octadecylsilyl groups. ■ Ultra High Purity Silica Gel This silica gel has ultra-high purity and significantly reduces the adhesion of fine powder and metal impurities compared to existing sphere-shaped silica gel series. For more details, please download the catalog or feel free to contact us.

"Ultrapur" is a high-purity reagent. With the improvement of sensitivity and accuracy in analytical instruments, the analysis of ultra-trace elements has become frequent in fields such as the semiconductor industry, medicine, biochemistry, and environmental chemistry. "Ultrapur" is suitable for extremely high-sensitivity analyses, such as those performed with ICP-MS instruments in these fields. 【Features】 ■ Purification and removal of impurities below the detection limit of analytical instruments Purified using our unique technology (non-boiling distillation) in a dedicated clean room. The content of impurity elements is suppressed to ppt levels, boasting very high purity. ■ Special containers to prevent contamination Sealed in Teflon bottles of carefully selected quality to maintain integrity. There is no concern about contamination from the container during storage. ■ New standard items added To be widely used in various fields such as drinking water quality standards, environmental standards, the semiconductor industry, and new materials, we guarantee 41 impurity elements. ■ Analysis report attached for each lot Each impurity element is tested by ICP/MS and AAS for each lot, and the measurement results are attached to the product as a test report. For more details, please download the catalog or feel free to contact us.

"Ultrapur-100" is a grade of ultra-high purity reagent that can be easily used for a wider range of applications. With the improvement in sensitivity and accuracy of analytical instruments, the analysis of ultra-trace elements is being conducted in fields such as the semiconductor industry, new materials, biochemistry, and environmental chemistry (drinking water quality, soil contamination). For trace metal analysis in such fields, including ICP-AES and ICP-MS, "Ultrapur-100" is highly recommended. 【Features】 ■ The highest grade reagent after Ultrapur - EL grade The purity achieved by the top-tier commercial reagent Ultrapur is not always required. "Ultrapur-100" ensures high purity next to Ultrapur and can be widely used for general metal analysis. ■ Adoption of specialized containers A newly developed special container made of extremely clean high-density polyethylene is used. It successfully minimizes contamination of the contents while keeping costs to a minimum. ■ Outstanding cost performance It achieves exceptional cost performance among commercially available high-purity reagents. It can be widely and easily utilized. For more details, please download the catalog or feel free to contact us.

"Precision Analysis Reagents (UGR)" are products that possess a quality of special grade or higher as defined by JIS standards and others. We particularly focus on standardizing and guaranteeing metals as impurities. 【Features】 ■ Guarantee of metals as impurities (18 types) ■ Quality of special grade or higher 【Product Lineup】 ◇ Acetone ◇ Benzene ◇ Ethanol (99.5) ◇ Methanol ◇ Nitric Acid 1.42 ◇ Chloroform ◇ Ninhydrin ◇ 2-Propanol ◇ Glacial Acetic Acid ◇ Acetonitrile ◇ Carbon Tetrachloride ◇ Potassium Chloride ◇ 48% Potassium Hydroxide Solution ◇ Potassium Hydroxide ◇ Potassium Sulfate ◇ Sodium Peroxide ◇ 25% Tetraethylammonium Hydroxide Solution In addition to these, we also handle high-purity reagents with different guarantee items. Please choose according to your analysis needs. ◇ Reagents for Metal Analysis ◇ Ultra High Purity Reagents 'ultrapur' ◇ High Purity Reagents 'primepure' ◇ Reagents for Atomic Absorption Analysis 'ASS' ◇ Measurement of Harmful Metals 'PMA' For more details, please download the catalog or feel free to contact us.

The "Harmful Metal Measurement Reagent (PMA)" is a reagent used to measure harmful metals such as As, Cd, Cr, Hg, and Pb, which are found in water bodies contaminated by factory wastewater and in aquatic life inhabiting those areas, at levels compliant with environmental standards. Standard values are set from several ppb to several tens of ppb for each harmful metal. It is suitable for analytical methods such as atomic absorption and ICP-AES. 【Features】 ■ Guaranteed for 12 types of harmful metals ■ Can be used as a reagent for pretreatment, dilution, and measurement 【Product Lineup】 ◇ Zinc (powder) ◇ Potassium permanganate ◇ Stannous chloride dihydrate (stannous chloride dihydrate) ◇ Hydroxyammonium chloride ◇ Potassium peroxydisulfate For more details, please download the catalog or feel free to contact us. We also offer high-purity reagents beyond this range. 【Product Examples】 ◆ Reagents for metal analysis ◆ Ultrapure high-purity reagents ◆ Primepure high-purity reagents ◆ Reagents for atomic absorption analysis ◆ Reagents for precision analysis Each has different guaranteed items, so please choose according to your purpose (analysis) and budget.

"Reagents for Atomic Absorption Analysis (AAS)" are reagents used for various purposes and applications in atomic absorption analysis. They provide a guarantee for low levels of metal impurities across multiple items, which is more comprehensive than that for precision analysis (UGR). The atomic absorption analysis method is widely used for the quantification of trace metals and is suitable for analyzing heavy metals in water, soil, and biological samples. 【Main Applications】 ◇ Pre-treatment ◇ Extraction solvents ◇ Masking agents ◇ Chelating agents ◇ Interference suppressants, etc. 【Features】 ■ Usable for various applications such as pre-treatment and extraction solvents ■ Guarantee for low levels of metal impurities ■ Ideal for the quantification of trace heavy metals For more details, please download the catalog or feel free to contact us. We also offer metal standard solutions based on the measurement traceability system (JCSS) for calibration curve creation. We encourage you to use them together. In addition, we provide high-purity reagents. 【Product Examples】 ◆ Reagents for metal analysis ◆ Ultrapure ultra-high purity reagents ◆ Primepure high-purity reagents …etc. Each has different guarantee items, so please choose according to your purpose and budget.

This product is a mouse C-peptide measurement kit from the ELISA kit series for basic research by Morinaga Bioengineering Laboratory, Inc. It can be measured with a small sample volume of 5μL, demonstrating high reproducibility from low to high concentration ranges. Using the ELISA sandwich method with microplates, it can be measured in a standard laboratory without the need for special facilities or equipment. For more details, please refer to the catalog below.

This product is a leptin measurement kit from the ELISA kit series for basic research by Morinaga Bioengineering Laboratory Co., Ltd. Since it uses the ELISA sandwich method with microplates, it does not require special facilities or equipment, allowing measurements to be conducted in a standard laboratory. There are two types of measurement methods: the standard measurement method and the applied measurement method (short-time measurement method). In addition to this product, insulin measurement kits and C-peptide measurement kits are also available. Please consider them together.

Glycerin is used in various applications such as solvents, ointment bases, and moisturizing and lubricating agents in pharmaceuticals. According to the Japanese Pharmacopoeia, the glycerin purity test states, "Use the special grade standard (however, when conducting the purity test for 'concentrated glycerin,' no peaks should be observed for the retention times of ethylene glycol and diethylene glycol)." Our company offers reagents that comply with the "Glycerin Gas Chromatography" standards set forth in the seventeenth revision of the Japanese Pharmacopoeia. We encourage you to consider our reagents for the purity test of pharmacopoeial glycerin.

The quantification of the pharmaceutical ingredient hypromellose is performed using gas chromatography with standard solutions of isopropyl iodide and iodomethane. Additionally, for the quantification of ethyl cellulose listed in the 17th Revised Edition of the Japanese Pharmacopoeia Second Supplement (June 2019), standard solutions with added ethyl iodide are used. Both are quantification reagents that comply with the purity tests and content standards specified in the Japanese Pharmacopoeia. In addition to this product, we also offer color reagents for thin-layer chromatography analysis, as well as reagents and test solutions for purified sodium hyaluronate. For more details, please refer to the catalog below.

The "reagents for metal analysis" cover all standards for UGR, harmful metal measurement, and atomic absorption analysis, guaranteeing many metals at the ppb level. They possess the quality to be the first choice in operations that dislike metal impurities, such as sample preparation and metal dissolution in metal analysis, making them suitable for a wide range of fields. 【Features】 ■ Reduction of metal impurities through specially treated bottles ■ Suitable for UGR, harmful metal measurement, and atomic absorption analysis ■ First choice for precise analysis Can be used in a wide range of fields. 【Product Lineup】 ◆ Acetic acid ◆ Ammonium hydroxide ◆ Hydrochloric acid ◆ Nitric acid 1.38 ◆ Perchloric acid (60%) ◆ Sulfuric acid For more details, please download the catalog or feel free to contact us. We also offer high-purity reagents beyond this range. 【Product Examples】 ◆ Reagents for metal analysis ◆ Ultrapur ultra-high purity reagents ◆ Primepure high purity reagents ◆ Reagents for atomic absorption analysis ◆ Reagents for precise analysis Each has different guarantee items, so please choose according to your purpose and budget.

The "L-column series" is a high-performance HPLC column manufactured and sold by the Chemical Evaluation and Research Institute (CERI), a public interest incorporated foundation. The L-column2 series features performance that surpasses the L-column series due to a novel end-capping method, making it suitable for the analysis of a wide range of compounds from acidic substances to basic substances and coordination compounds. It does not disappoint as the first-choice column for method development. On the other hand, the long-selling L-column ODS is a highly versatile silica gel-based reversed-phase HPLC column that has excellent separation performance since its launch, thanks to a new end-capping technology (patent No. 2611545) involving high-temperature gas-phase reactions that had not been previously used. It boasts high reliability and enduring popularity. For more details, please download the catalog or feel free to contact us.

The "Mightysil Series" is a particle-filled HPLC column that uses high-purity silica gel with extremely low metal impurities. We offer a range of packing materials centered around ODS (C18: octadecyl group), including C8 (octyl group), C4 (butyl group), NH2 (aminopropyl group), and Si60 (silica gel 60) types. Additionally, for application-specific columns, we conduct tests on the elution behavior of each batch of packing material as part of the GP series, as well as add items based on the analysis targets corresponding to those applications. 【Features】 ■ High-purity silica gel material Purity of 99.99% (SiO2) or higher ■ Full end-capping Inertness of polar groups (silanol groups) on the packing surface is maximized ■ High durability Enhances separation accuracy and reduces pressure loss ■ Reproducibility guarantee Guarantees reproducibility between packing material batches and columns 【Product Lineup】 ◆ Supports analytical validation ◆ Compatible with 100% water eluent ◆ LC/MS compatible ◆ For pesticide analysis ◆ For DNPH-derivatized aldehyde measurement ◆ For petroleum product testing …etc For more details, please download the catalog or feel free to contact us.

"Silver column KANTO" is a new HPLC column for silver ion chromatography based on zirconium phosphate. It is particularly useful for the separation, analysis, and purification of fats and oils with complex compositions. This product overcomes the challenges of conventional silver nitrate-impregnated silica gel, offering high safety and distinctive separation capabilities, with potential applications beyond the food sector. 【Features】 ■ Separation of cis/trans isomers Generally, the cis isomer has a higher stability of the complex formed with Ag+ than the trans isomer, resulting in the cis isomer being retained more strongly while the trans isomer elutes first. ■ Separation of positional isomers Regardless of the number of carbon atoms, the further the double bond is from the carbonyl carbon, the faster it elutes. Additionally, in the separation of aromatic compounds, they elute in the order of o-isomer, m-isomer, and p-isomer. ■ Separation of fatty acids with different carbon chain lengths Fatty acids with a higher number of carbon atoms elute faster. Moreover, those with more double bonds are retained more strongly. ■ Separation of compounds with multiple double bonds Non-conjugated double bonds are retained more strongly than conjugated double bonds. Furthermore, the closer the double bonds are to each other, the faster they elute. For more details, please download the catalog or feel free to contact us.

The "G-column" is a gas chromatography column with a Pyrex glass column that has an inner diameter of 1.2mm, chemically bonded with a liquid phase on its inner surface. Despite having the same hollow structure as a capillary column, it features a large diameter, providing unique characteristics not found in conventional packed columns or capillary columns. 【Features】 ■ Compatible with most gas chromatographs Columns can be selected based on the analysis purpose. Additionally, with a maximum length of 40m, it offers a higher theoretical plate count compared to packed columns, enabling high-resolution analysis. ■ Large sample injection The product excels in high-precision quantitative analysis, allowing for large sample injections that are difficult with capillary columns. Its large diameter facilitates significant sample injection, simplifying pre-treatment processes like sample concentration. Samples are smoothly introduced into the column, making it ideal for analyzing substances that are prone to thermal decomposition. ■ Chemically bonded liquid phase With minimal bleeding, the chemically bonded liquid phase inside the inert-treated column remains stable over long periods, exhibiting less variation in retention factors. It does not adsorb alcohols, acids, amines, etc., allowing for the analysis of many compounds using the same column. For more details, please download the catalog or feel free to contact us.

We offer a range of titration solutions certified to ISO/IEC 17025, ensuring they are internationally recognized and can be used with confidence. We comply with international mutual recognition agreements (MRA) aimed at One-Stop-Testing*, clearly stating the "uncertainty" that underpins the reliability of test results. We can provide test certificates featuring the MRA composite symbol and JAB certification symbol, which will be accepted worldwide. *One-Stop-Testing: A system where data obtained from a single testing laboratory is valid and accepted globally. *MRA (Mutual Recognition Arrangement): An agreement for mutual recognition. 【Applicable Items】 ◇ Disodium ethylenediaminetetraacetate solution ◇ Hydrochloric acid ◇ Sodium hydroxide solution ◇ Sulfuric acid ◇ Perchloric acid and acetic acid solution ◇ Potassium permanganate solution ◇ Sodium oxalate solution ◇ Silver nitrate solution ◇ Sodium chloride solution ◇ Sodium thiosulfate solution ◇ Iodine solution For more details, please download the catalog or feel free to contact us.

We offer a wide range of dilution solutions, titration solutions (standard solutions), and preparation solutions based on JIS K 8001. We also have many products certified under ISO/IEC 17025, so you can use them with confidence. We provide solutions for volumetric analysis, non-aqueous titration, and more. 【Features】 ■ Titration solutions that are recognized worldwide We provide test reports with MRA composite symbols and JAB certification symbols. We comply with international mutual recognition (MRA*) aimed at One-Stop-Testing*, clearly stating the "uncertainty" that ensures the reliability of test results. *One-Stop-Testing: A system where data obtained from a single testing laboratory is accepted and recognized worldwide. *MRA (Mutual Recognition Arrangement): An agreement for mutual recognition. ■ Factor values displayed on the label Standard values (F: Factor) are set between "0.990 and 1.009." We also handle products guaranteed with a factor of 1.000. ■ Quality assurance period displayed on the label The quality assurance period for unopened products is indicated on the label. For more details, please download the catalog or feel free to contact us.

"Indicators" are reagents used in titration. We offer indicators for neutralization titration, precipitation titration, redox titration, complexometric titration, etc., as specified in JIS K 8001. 【Product Lineup】 ◇ Iron(III) ammonium sulfate solution ◇ Bromocresol green solution ◇ Bromocresol purple solution ◇ Bromophenol blue solution ◇ Cresol red solution ◇ Cresol red solution ◇ Methyl red solution ◇ 4-Nitrophenol solution ◇ Phenolphthalein solution ◇ Phenol red solution ◇ Thymol blue solution ◇ Uranine solution 　　　　　　…etc For more details, please download the catalog or feel free to contact us. Additionally, we handle reagents such as volumetric analysis titration solutions compliant with ISO/IEC 17025. Please refer to the catalog for more information.

The quantitative test for protein-based pharmaceuticals (Lowry method) and the measurement of protein digestibility of digestive enzyme preparations use "Folin's reagent." This product is prepared in accordance with "Folin's reagent" listed in the Japanese Pharmacopoeia. In addition to the above, we also offer products related to protein research, such as reagents for protein electrophoresis and reagents for biomarker measurement. Please feel free to contact us.

The "wetting tension test mixed solution" is a test solution based on the plastic-film and sheet-wetting tension test method (JIS K 6768). This mixed solution is prepared by gradually mixing water, methanol, formamide, and ethylene glycol monoethyl ether. It can be used for wetting tension tests of polyethylene films, polypropylene films, and general plastic films and sheets. Since this test is easily affected by temperature and humidity, it is used under specified standard test room conditions (temperature 23°C, relative humidity 50%). For more details, please download the catalog or feel free to contact us.

In the "Regulations for the Enforcement of the Law Concerning the Assurance of Quality of Volatile Oil, etc.," the addition of biodiesel fuel to diesel is permitted. Currently, there are two types of diesel: "diesel with added BDF" and "diesel without added BDF," and their standard values and testing methods are established. Our company offers products that can be used for these tests. 【Product Lineup】 ◆ Reagents related to the determination of the volatility of petroleum products (JIS K 2254) ◆ Reagents related to the neutralization value testing method for petroleum products and lubricants (JIS K 2501) ◆ Reagents related to the measurement of oxidation products in volatile oil ◆ Reagents for standard analysis methods for diesel identification using coumarin ◆ Reagents related to the determination of octane number, cetane number, and cetane index for petroleum products (JIS K 2280) ◆ Reagents related to aviation lubricant testing methods (JIS K 2503) ◆ Reagents for testing sulfur content in crude oil and petroleum products (JIS K 2541) ◆ Reagents related to the determination of moisture in crude oil and petroleum products (JIS K 2257-2, 2257-3) ◆ Reagents for FIA analysis We also have dedicated HPLC columns, standard solutions, ASTM D-6584, FAME, etc. For more details, please download the catalog or feel free to contact us.

The RoHS Directive is a directive from the European Union (EU) regarding the restriction of the use of certain hazardous substances in electrical and electronic equipment. Until now, we have been releasing standards compliant with RoHS, but with the revised RoHS Directive (RoHS 2.0) that came into effect on July 22, 2019, the number of restricted substances has increased from 6 to 10. As a result of this directive, we have released RoHS 2 compliant standards that include 4 additional phthalate esters. [List of regulated substances under the revised RoHS Directive] Cadmium Lead Hexavalent chromium Mercury Polybrominated diphenyl ethers Polybrominated diphenyl Di-2-ethylhexyl phthalate Dibutyl phthalate Butyl benzyl phthalate Diisobutyl phthalate Similar to the previous RoHS compliant standards, we have added the 10 regulated substances of RoHS 2.0 as standard items in the special grade standards. Additionally, the guaranteed values are set to be less than 1/10 to 1/100 of the regulatory values. In addition to mixed standard solutions and standard materials for environmental analysis, we also handle JCSS compliant standard solutions and certified standard materials. Please choose according to your analysis needs. For more details, please download the catalog or feel free to contact us.

● Reagents for COD Measurement We offer reagents used for measuring Chemical Oxygen Demand (CODMn) by potassium permanganate (KMnO4) as specified by official methods. *Official methods: Industrial water testing methods (JIS K0101) / Factory wastewater testing methods (JIS K0102) / Mine water and wastewater testing methods (JIS M0202) / Sewage testing methods ● Reagents for BOD Measurement Our BOD seed is a blended inoculum that contains bacteria capable of isolating various organic substances, formulated to achieve BOD values equivalent to those obtained from inoculum prepared from sewage sludge. The bacteria included in the formulation are produced and blended under strict product and lot management after being individually cultured. For more details, please refer to the catalog below.

This is a reverse column with excellent separation characteristics for the cleanup process of dioxins. By performing thermal treatment under a nitrogen gas flow, we are able to remove interfering substances for analysis, so there is no need for cleaning operations before use. We recommend using a dedicated reservoir for the reverse column, a separatory funnel, and a Teflon straight union together. For more details, please refer to the catalog below.

The standards for residual pesticides under the Food Sanitation Act, the establishment of a positive list system, the implementation of new drinking water quality standards, and the provisional guidance on pesticides related to golf courses are increasing the importance of measuring pesticides present in food and the environment. Our company offers a wide range of reagents for residual pesticide testing that are suitable for ultra-trace analysis. In addition to our conventional products guaranteed to be 300 times concentrated, we also have products with enhanced quality specifications guaranteed to be 5000 times concentrated. These are useful for high-sensitivity analysis, so please consider them.

This catalog summarizes standard solutions related to pharmaceutical testing. ◆Metal Standard Solutions◆ These are metal standard solutions prepared at specified concentrations in accordance with the Japanese Pharmacopoeia. The concentration values are based on MRA JCSS compliant products that are traceable to national standards. ◆Mixed Standard Solutions for ICP Analysis◆ These are mixed standard solutions containing seven elements (As, Cd, Pb, Hg, Co, V, Ni) that are subject to the elemental impurity guidelines for pharmaceuticals (ICH Q3D). ◆MRA JCSS Compliant Standard Solutions◆ We supply standard solutions that are traceable to national standards and issue certificates bearing the JCSS mark as proof of reliability. ◆Standard Solutions for Volumetric Analysis◆ These are standard solutions for volumetric analysis with guaranteed concentrations through preparation and standardization in accordance with the Japanese Pharmacopoeia. ◆Color Comparison Solutions◆ We provide comparison solutions of cobalt chloride, iron chloride, and copper sulfate. The sulfuric acid for the sulfuric acid color test is a diluted solution prepared to comply with the reagent standards of JIS, the Japanese Pharmacopoeia, and the United States Pharmacopeia. In addition to the above, we also offer products related to general testing methods of the Japanese Pharmacopoeia. For more details, please refer to the catalog below.

The "Pack Test Series" manufactured by Kyoritsu Chemical-Check Lab. Co., Ltd. is the simplest water quality measuring device. It is a testing kit that allows for easy water quality measurement by sucking the sample water into a tube containing reagents and comparing the color of the water after the reaction time with a standard color. It can be applied not only to environmental water such as groundwater, industrial water, and industrial wastewater management but also to leaching tests under soil contamination countermeasure laws. 【Examples of Use】 ■ Drinking water testing (well water, drinking water, water tank inspections, etc.) ■ Educational materials (science experiments, food inspections, etc.) ■ Process management, wastewater management (water usage management, residual inspections, etc.) ■ Environmental testing (water quality testing of rivers and lakes, hot spring surveys, etc.) ■ Agriculture (hydroponic nutrient solution management, agricultural water testing, etc.) Additionally, we also offer digital pack tests. We have portable multi-parameter water quality meters and handheld single-parameter water quality meters available. For more details, please download the catalog or feel free to contact us.

The "RQ Flex" is a palm-sized reflective photometer that uses a dedicated test paper called "ReflectQuant" for a simple analysis system. It can easily and quickly measure the concentrations of various components in sample solutions, such as nutrients like nitrogen, phosphorus, and potassium found in soil and crops, as well as vitamin C in beverages and ammonium in wastewater. It can be used in a wide range of fields, including nutrient diagnostics for soil and crops, as well as component analysis for food, beverages, and factory wastewater. Please contact us if you have any requests for various applications. 【Features】 ■ Supports multi-parameter measurement with one device Can measure approximately 30 items, including metals, non-metals, and organic substances. ■ Pocket-sized and portable Compact size makes it suitable for measurements in the field. ■ Saves time and costs with simple operation More convenient than advanced equipment analysis, allowing anyone to perform analysis in a short time. ■ Accurate and high-precision results By performing two measurements simultaneously with one operation and displaying the average value, more accurate analysis results can be obtained. ■ High correlation with equipment analysis High correlation with ion chromatography has been confirmed. For more details, please download the catalog or feel free to contact us.

The "Rapid DPD Reagent Series" is a product that allows for the simplified one-step implementation of the DPD method, which is a representative testing method for residual chlorine in accordance with the Water Supply Act and drinking water testing methods. "Rapid DPD Reagent Series" (powder and tablet types) The Rapid DPD reagent is a simplified analytical reagent prepared based on the principles of the DPD method, designed to streamline the operation into one step. By simply dissolving a fixed amount per 10 mL of sample water, it is possible to easily measure free residual chlorine using various commercially available measuring devices. We offer four types (individually packaged and tablet) to suit different measurement sites and purposes. Please consider using it for simple residual chlorine measurement. *The Rapid DPD reagent is a simplified analytical reagent for measuring residual chlorine, and it provides results comparable to those obtained by official methods, making it suitable for measuring free residual chlorine in drinking water and similar applications. "Rapid DPD Liquid" (liquid type) The Rapid DPD Liquid is a one-component reaction reagent that allows for easy measurement of free residual chlorine by simply adding a specified amount per 10 mL of sample water. For more details, please download the catalog or feel free to contact us.

The "Dr. Sick House/Formaldehyde Test Strip" is a test strip that allows for the simple and rapid detection of formaldehyde in indoor air. It can be evaluated by placing the test strip indoors for about 5 to 10 hours. Formaldehyde, considered one of the causative substances of "Sick House Syndrome," is widely used in building materials, wallpaper, paint materials, and household goods, with the emission into indoor air being a major concern. The Ministry of Health, Labour and Welfare has provided guideline values for indoor formaldehyde concentration (0.1 mg/m3 or below for a 30-minute average, approximately 80 ppb), and the Ministry of Land, Infrastructure, Transport and Tourism has revised building standards, among other measures, to reduce formaldehyde levels from various sectors, including public and private. For more details, please download the catalog or feel free to contact us.

We sell the following products as reagents specifically for the NP600 automatic measurement device for total nitrogen and total phosphorus manufactured by Yokogawa Electric Corporation. Additionally, we offer a variety of standard solutions that serve as calibration span solutions, allowing for the adjustment of nitrogen and phosphorus concentrations in various ways. Please use them together. 【Related Products】 ◆ Nitrogen Standard Solution 100mL ◆ Phosphorus Standard Solution 100mL ◆ Distilled Water 500mL 20L

The "Aqualight" series is a reagent developed for Karl Fischer measurement, starting with HIRANUMA's moisture measurement devices "Volumetric Method: AQV/MOIVO Series" and "Coulometric Method: AQ/MOICO Series." In the 18th revision of the Japanese Pharmacopoeia, the moisture measurement method (Karl Fischer method) has been significantly revised. Based on the premise that appropriate moisture measurement can be confirmed in conformity tests, it has become possible to flexibly use commercially available moisture measurement reagents, taking into account the solubility of samples and potential interference with the Karl Fischer reaction. For details on each product, please refer to the catalog.

The potassium chloride for infrared spectroscopic analysis that we are currently selling is a white powder, similar to the potassium bromide we have traditionally sold, and is easy to handle. Additionally, we guarantee all items of the Japanese Industrial Standards (JIS) reagent special grade, so you can use it with confidence. For more details, please refer to the catalog below.

Our company sells the PF-KANTO and PH-KANTO series as dedicated reagents for the Hitachi high-speed amino acid analyzers LA8080 and L-8900. The PF-KANTO set is for biological fluid analysis, while the PH-KANTO set is for protein hydrolysate analysis. Each set consists of four types of buffer solutions and one type of column regeneration solution (a total of five types), containing two each of PF-1 and PF-4, or PH-1 and PH-4, for a total of seven bottles. For more details, please refer to the catalog below. Please also consider using our set products. ◆ Buffer solution for biological fluid analysis: PF-KANTO set ◆ Buffer solution for protein hydrolysate analysis: PH-KANTO set We also offer individual buffer solutions that can be purchased separately.

The "L-column3" is a high-performance HPLC column manufactured and sold by the Chemical Evaluation and Research Institute (CERI), a general incorporated foundation. The "L-column3" features newly developed PCS silica (Perfect Chemical Stable Silica) with very high alkali resistance and enhanced durability through advanced end-capping, significantly improving the chemical durability of the packing material (acid resistance, alkali resistance), making it an all-around column. 【Features】 ■ High alkali resistance, usable from pH 1 to 12 ■ Top-class low adsorption for all types of analyses ■ The ability to freely select the pH of the eluent improves separation and peak shape ■ Stable analysis even with 100% aqueous eluents 【New Products】 ◇ High-pressure column L-column3 HP type ◇ Semi-preparative column L-column3 For more details, please download the catalog or feel free to contact us.