Description

5-Oxo-4,5-Dihydro-1-(4-Sodiosulfophenyl)-4-[(2,4-Dimethyl-6-Sodiosulfophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid Sodium Salt is a high-purity, water-soluble azo pyrazolone dye intermediate. This compound is valued for its ability to impart bright, stable yellow to orange hues in various industrial applications. It is primarily required by manufacturers in the textile, ink, and specialty chemical sectors seeking reliable and consistent colorant precursors.

Application

• Textile Dyeing: A key intermediate for synthesizing acid and direct dyes used on nylon, wool, and silk fibers.
• Ink Manufacturing: Used in the production of pigments for inks, including those for packaging and security printing.
• Paper Coloring: Employed in the manufacture of dyes for specialty and decorative papers.
• Leather Finishing: Serves as a colorant intermediate in dyes for leather products.
• Liquid Crystal Displays (LCDs): Potential use as a color filter dye intermediate in electronic displays.
• Research & Development: Used as a standard or building block in organic synthesis and color chemistry research.

Basic Information

Product Name	5-Oxo-4,5-Dihydro-1-(4-Sodiosulfophenyl)-4-[(2,4-Dimethyl-6-Sodiosulfophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid Sodium Salt
CAS No.	6359-62-2
Molecular Formula	C19H14N4Na2O8S2
Molecular Weight	544.44 g/mol
Synonyms	Acid Yellow 117; C.I. 24820; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(2,4-dimethyl-6-sulfophenyl)azo]-, sodium salt (1:2); Tartrazine Analog; FD&C Yellow 5 Analog; Pyrazolone Yellow; Azo Pyrazolone Dye Intermediate
EINECS	228-786-8

Quality Control

Our production of 5-Oxo-4,5-Dihydro-1-(4-Sodiosulfophenyl)-4-[(2,4-Dimethyl-6-Sodiosulfophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid Sodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for industrial applications. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request.

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 minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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