Kowa Company, Ltd. List of Products and Services

Niobium pentoxide (Nb₂O₅) is a white to grayish-white powdered oxide widely used in electronic components, ceramics, catalysts, and metallurgy. This product is of Indian origin, STANDARD GRADE (purity over 99.9%), and is available in powder form (100% below 20 mesh), making it easy to handle and ensuring stable quality. In the metallurgy field, it is primarily used for the production of metallic niobium and as an alloy additive. In electronic component applications, it serves as a dielectric and capacitor material, while in ceramics and optical glass, it is utilized for refractive index control and heat resistance improvement. In catalyst applications, it is employed in oxidation and dehydrogenation reactions. Thanks to a consistent manufacturing system within India, we can flexibly accommodate orders from sample sizes (1kg, 5kg) to mass production scales. Additionally, impurities are strictly controlled at the ppm level, and analysis certificates (COA) and safety data sheets (SDS) can be issued for each lot. We have a proven track record of supply in markets centered around Europe, ensuring stable transportation and high reliability of products with traceability. In recent years, it has gained attention in research for next-generation battery materials and optical devices, and it features a sustainable supply system utilizing recycled materials. It is also adopted as a high-reliability material in the aerospace and automotive fields.

Tantalum pentoxide (Ta₂O₅) is a white powder oxide with high dielectric constant, heat resistance, and corrosion resistance, playing an important role as a high-performance material in the industrial sector. This product is of STANDARD GRADE (purity over 99.9%) sourced from India, adopting a powdered form that ensures stable quality and ease of handling. Primarily, it is used in the metallurgy field as a reinforcing material for metallic tantalum and superalloys, while in the electronics sector, it is utilized in capacitors and high-dielectric oxide film materials. Additionally, by adding it to ceramics and optical glass, it contributes to improved heat resistance and mechanical strength, and in catalytic applications, it enhances the efficiency of oxidation reactions in petrochemical and fine chemical processes. Thanks to a consistent manufacturing system within India, we can flexibly accommodate orders from sample sizes (1kg, 5kg) to mass production scales, with a wealth of supply records in the European, American, and Japanese markets. Furthermore, each lot is analyzed using ICP-OES and XRF, and a Certificate of Analysis (COA) is issued, ensuring traceability with product names and numbers. The product is packaged with moisture-proof liners, allowing for long-term stabilization of quality through indoor storage away from direct sunlight and high humidity. It is also gaining attention as a high-reliability component for the aerospace and automotive industries and is widely adopted for research and development purposes.

Niobium pentoxide (Nb₂O₅) is a white to grayish-white powdered oxide that is an important material widely used in electronic materials and optical fields. This product is of Indian origin and is OPTICAL GRADE (purity of 99.99% or higher), adopting a powdered form (100% below 20 mesh) with extremely high transparency and refractive index control. It is specifically designed to achieve both high transparency and high refractive index in optical glass and optical thin films, and is utilized in cutting-edge optical devices, lenses, and electronic components. Furthermore, the impurity levels are kept below ppm (with Fe, Cr, Cu, Mn, Mo, and Ni all below 2 ppm), and strict quality control compliant with international standards is implemented. We can flexibly respond from sample supply to mass production scale, ensuring stable supply for research and development as well as commercial applications, primarily in the European and Japanese markets. Each lot is analyzed using ICP-OES and XRF, and a COA and SDS are issued. The product is provided in drums with moisture-proof liners, ensuring long-term stability through storage away from direct sunlight and humidity. Additionally, we actively incorporate recycled materials, supporting sustainable sourcing. The adoption of this product is also expanding in next-generation optical devices and advanced electronics fields.

Tantalum pentoxide (Ta₂O₅) is a white powder oxide with high dielectric constant, high heat resistance, and high corrosion resistance, making it an essential material in the optical and electronics fields. This product is of Indian origin and is classified as OPTICAL GRADE (purity of 99.99% or higher), adopting a powdered form that offers extremely high transparency and refractive index control. It particularly achieves high transparency and high refractive index in optical glass and optical thin films, being utilized in cutting-edge optical devices, electronic components, and communication devices. Impurity management is thoroughly controlled at levels below ppm (with Fe, Cr, Mn, Mo, and Ni all below 1 ppm, Nb below 15 ppm, and F below 150 ppm), and strict quality assurance compliant with international standards is implemented. Furthermore, each lot undergoes analysis by ICP-OES and XRF before a Certificate of Analysis (COA) is issued, and it is supplied in drums with moisture-proof liners to maintain stability during long-term storage. We can flexibly accommodate orders from sample sizes (1kg, 5kg) to mass production scale, with a proven track record in both research and commercial applications in the European and Japanese markets. Additionally, adoption is progressing in the aerospace and next-generation electronics fields, with demand on the rise.

Tin (Sn) is a non-ferrous metal with a silvery-white luster, high ductility, re-meltability, and corrosion resistance, making it an essential material in a wide range of industrial fields such as solder, bronze, and plating applications. This product is Grade B (purity over 99.0%) ingots sourced from Brazil, designed in a manageable shape of 20-30 kg units. Impurities such as lead, copper, and iron are strictly controlled, ensuring excellent fluidity and oxidation stability during re-melting and casting. It exhibits high wettability and processing stability, particularly in electronic components, solder alloys, and tinplate, minimizing slag generation during the re-melting process. Chemical analysis (ICP/OES) is conducted for all lots, and quality assurance is performed at an ISO-certified factory. Additionally, an environmentally friendly process utilizing recycled metals is adopted, contributing to CO₂ reduction. We have established a flexible system capable of accommodating everything from research and development to mass production, and as a high-quality, reliable, and environmentally friendly tin from Brazil, demand is expanding across the electronics, metals, and chemicals sectors. Moreover, its adoption as a highly reliable material in the automotive, semiconductor, and electrical fields is progressing, making it a material adaptable to global supply chains. It is also optimal for long-term supply with stable quality and compliance with environmental regulations.

Ammonium Hydroxide (29%) is a colorless, transparent alkaline solution created by dissolving ammonia gas in pure water, widely used as a fundamental chemical in the electronics, pharmaceuticals, and optics fields. This product is of Electronic / Cleanroom Grade sourced from India, utilizing a super-pure water process through RO + DM treatment. This process thoroughly removes impurities such as particles and metal ions to ppm to ppb levels, achieving a high standard of cleanliness required for electronic material manufacturing. It demonstrates excellent cleaning ability and homogeneity, particularly in the manufacturing processes of semiconductor wafer cleaning, optical glass, and electronic components, allowing for stable use even in cleanroom environments. Major metal impurities (Fe, Cu, Ni, Pb, Na, K, etc.) are managed to below 300 ppb, and the particle count (≥1.0µm) meets extremely strict quality standards of below 25 particles/mL. The product is supplied in Jerry Cans / Plastic Drums / IBC Totes, utilizing HMHDPE containers that offer excellent storage stability. We can flexibly accommodate requests from sample provision to mass production shipments.

Ammonium Hydroxide (25%) is a colorless, transparent alkaline solution made by dissolving ammonia gas in pure water, and it is a fundamental chemical used in various fields such as industry, batteries, pharmaceuticals, and catalysts. This product is manufactured at multiple locations within India and is produced under quality control based on the IS 799:2023 standard. The raw material ammonia is primarily sourced from India and the Middle East (Saudi Arabia), establishing a stable supply system that is free from China. By using high-purity raw materials and pure water, the concentrations of impurities such as chlorides, heavy metals, silica, and sulfides are managed to below ppm levels, demonstrating excellent performance in suppressing by-products during chemical reactions and purification processes. In particular, in the battery sector, it is used for pH adjustment and purification in the processes of cathode materials, conductive additives, and precursor co-precipitation. In the pharmaceutical field, it is employed as a neutralizing agent, buffer solution, and reaction solvent. In the catalyst sector, it is used for the precipitation and carrier modification of metal hydroxides and oxides, and in industrial applications, it is widely utilized for pH control, neutralization, and reagent preparation. This versatile high-purity ammonium hydroxide can flexibly accommodate needs from research applications to mass production scales, supporting high-precision processes in the fields of chemistry, energy, pharmaceuticals, and materials.

"Rexene FeD12" is DTPA chelated iron. Due to its high solubility, it can be easily dissolved in concentrated tanks. DTPA iron is considered to be more stable than EDTA iron at pH levels ranging from 1.5 to 7.5. Compared to EDTA iron, the likelihood of precipitates such as iron hydroxide and iron phosphate is lower. Being a crystalline powder, it contains almost no impurities. It is less likely to cause clogging in strainers and tubes. [Features] ■ Chemical name: Diethylenetriamine pentaacetic acid, iron, sodium salt ■ Appearance: Yellow-brown, crystalline powder ■ Iron content: 11.6% (representative value) ■ Packaging: 25kg bag *For more details, please download the PDF or feel free to contact us.

We would like to introduce our EDTA chelated copper, "Rexene Cu15." Due to its high solubility, it can be easily dissolved in concentrated tanks. EDTA copper is considered stable at pH levels from 1.5 to 10. Below pH 5.5, copper sulfate reacts with chelated iron, causing iron to precipitate; therefore, the use of chelated copper is desirable to protect chelated iron. It is less likely to cause clogging in strainers and tubes. 【Features】 ■ Chemical name: Ethylenediaminetetraacetic acid, copper, disodium complex ■ Appearance: Blue powder ■ Copper content: 14.8% (representative value) ■ Packaging: 25kg (in bags or boxes) *For more details, please download the PDF or feel free to contact us.

We would like to introduce our EDTA chelated manganese, 'Rexene Mn13'. Due to its high solubility, it can be easily dissolved in concentrated tanks. EDTA manganese is considered stable from pH 3 to 10. Below pH 5.5, manganese sulfate reacts with chelated iron, causing iron to precipitate; therefore, the use of chelated manganese is desirable to protect chelated iron. It is less likely to cause clogging in strainers and tubes. 【Features】 ■ Chemical name: Ethylenediaminetetraacetic acid manganese, disodium complex ■ Appearance: Milky white powder ■ Manganese content: 12.8% (representative value) ■ Packaging: 25kg bag *For more details, please download the PDF or feel free to contact us.

We would like to introduce our EDTA chelated zinc product, 'Rexene Zn15'. Due to its high solubility, it can be easily dissolved in concentrated tanks. EDTA zinc is considered stable at pH 2 to 10. Below pH 5.5, zinc sulfate reacts with chelated iron, causing iron to precipitate; therefore, the use of chelated zinc is desirable to protect chelated iron. It is less likely to cause clogging in strainers and tubes. 【Features】 ■Chemical name: Ethylenediaminetetraacetic acid, zinc, disodium complex ■Appearance: White powder ■Zinc content: 14.8% (representative value) ■Packaging: 25kg bag *For more details, please download the PDF or feel free to contact us.

We would like to introduce our EDTA chelated iron, "Rexene FeE13." Due to its high solubility, it can be easily dissolved in concentrated tanks. It is less likely to cause clogging in strainers and tubes. EDTA iron is considered stable at a pH range of 1.5 to 6.5. 【Features】 ■ Chemical name: Ethylenediaminetetraacetic acid, sodium salt, trihydrate ■ Appearance: Yellow-brown powder ■ Iron content: 13.3% (representative value) ■ Packaging: 25kg bag *For more details, please download the PDF or feel free to contact us.