Description

Trisodium 1-(5-Amino-2-Methyl-3-Sulphonatophenyl)-4,5-Dihydro-5-Oxo-4-[(2-Sulphonatophenyl)Azo]-1H-Pyrazole-3-Carboxylate is a high-purity, water-soluble azo pyrazolone dye intermediate. This compound is critical for synthesizing high-value, brilliant yellow to orange dyes and pigments with excellent light and wash fastness properties. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking to produce consistent, vibrant colors for demanding applications.

Application

• Textile Dyeing: A key intermediate for producing reactive and direct dyes for cotton, wool, and nylon, offering bright yellow and orange shades.
• Ink Manufacturing: Used in the synthesis of pigments for inks in packaging, printing, and writing instruments.
• Industrial Coatings: Serves as a precursor for pigments used in automotive paints, industrial finishes, and plastics coloration.
• Paper Coloring: Employed in the production of dyes for high-quality paper and specialty board products.
• Leather Finishing: Used in dye formulations for coloring leather goods.
• Research & Development: A valuable chemical building block for developing new colorants and studying azo dye chemistry.

Basic Information

Product Name	Trisodium 1-(5-Amino-2-Methyl-3-Sulphonatophenyl)-4,5-Dihydro-5-Oxo-4-[(2-Sulphonatophenyl)Azo]-1H-Pyrazole-3-Carboxylate
CAS No.	93857-66-0
Molecular Formula	C18H12N5Na3O10S2
Molecular Weight	607.41 g/mol
Synonyms	Acid Yellow 220 (sodium salt); C.I. 27795; Trisodium 5-amino-4-(2-sulfophenyl)azo-3-methyl-1H-pyrazole-3-carboxylate-6-sulfonate; 1H-Pyrazole-3-carboxylic acid, 1-(5-amino-2-methyl-3-sulfophenyl)-4,5-dihydro-5-oxo-4-[(2-sulfophenyl)azo]-, trisodium salt; Pyrazolone Yellow Intermediate; Reactive Yellow Dye Intermediate; Azo Pyrazolone Dye
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high chemical purity. Every lot is tested against established specifications for identity, assay, and impurity profiles. A Certificate of Analysis (COA) detailing these results is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.