1-(4'-Sulfophenyl)-3-carboxy-5-pyrazolone, identified by its CAS number 118-47-8, stands as a crucial chemical intermediate widely recognized for its versatility and importance across various industrial sectors. This compound, also known by synonyms such as 3-Carboxy-1-(4-sulfophenyl)-2-pyrazolin-5-one and 5-Oxo-1-(4-sulfophenyl)-2,5-dihydro-1H-pyrazole-3-carboxylic acid, possesses a molecular formula of C10H8N2O6S and a molecular weight of 284.245 g/mol.

As a light yellow crystalline powder, 1-(4'-Sulfophenyl)-3-carboxy-5-pyrazolone exhibits distinct physical and chemical properties that make it highly valuable. It has a density of approximately 1.75 g/cm3 and a melting point ranging from 260-270ºC, at which it begins to decompose. It is readily soluble in water and certain organic solvents, though it can decompose under alkaline conditions. These characteristics ensure its effective integration into diverse manufacturing processes.

The primary application of 1-(4'-Sulfophenyl)-3-carboxy-5-pyrazolone lies as a coupling component in the synthesis of organic synthetic dyes and pigment varieties. Its unique molecular structure allows for the creation of vibrant and stable colorants essential for textiles, paints, inks, and plastics. Beyond the coloration industry, its utility extends significantly into other specialized fields. It serves as a key intermediate in the pharmaceutical industry for developing various drugs and is also instrumental in the production of fluorescent materials, including pyrazoline fluorescent dyes, which are vital for diagnostics and advanced optical applications. Furthermore, its ability to act as a metal complexing agent highlights its broader chemical significance.

The global market for intermediates like 1-(4'-Sulfophenyl)-3-carboxy-5-pyrazolone continues to demonstrate steady growth, driven by consistent demand from its diverse downstream applications. As industries worldwide increasingly require high-performance, consistent chemical supplies, the importance of reliable sourcing cannot be overstated. Manufacturers committed to quality and purity are indispensable to this supply chain.

NINGBO INNO PHARMCHEM CO.,LTD. is a leading manufacturer and supplier of high-purity 1-(4'-Sulfophenyl)-3-carboxy-5-pyrazolone. We specialize in producing this essential chemical with a guaranteed purity of ≥99.0%, ensuring optimal performance for critical applications. Our commitment to stringent quality control and efficient production processes enables us to provide a consistent and reliable supply. We understand the market's need for both exceptional product quality and competitive price points. For businesses looking to buy or purchase this indispensable chemical, NINGBO INNO PHARMCHEM CO.,LTD. offers flexible packaging solutions, typically in 25kg drums, and maintains optimal storage conditions at -20°C in cool, dry, sealed environments to preserve product integrity. Our dedicated team is ready to assist with all inquiries, ensuring a smooth and efficient procurement process for clients globally who seek a dependable supply of this critical intermediate.