Description

Disodium 4,5-Dihydro-5-Oxo-4-(Phenylazo)-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate is a high-purity, water-soluble azo pyrazolone derivative, valued for its vibrant color and chemical stability. This compound is engineered to deliver consistent performance as a key intermediate in the synthesis of high-value dyes and pigments. It is essential for manufacturers in the textile, ink, and specialty chemical industries seeking reliable quality for their colorant production.

Application

• Primary Intermediate for Dyes & Pigments: A crucial building block in the synthesis of acid dyes, reactive dyes, and high-performance pigments.
• Textile Industry: Used in the manufacturing of dyes for coloring nylon, silk, wool, and other protein-based fibers.
• Ink Formulation: Serves as a colorant component in the production of inks for specialty printing applications.
• Research & Development: Employed as a standard or reagent in chemical research for developing new chromophores and functional materials.
• Specialty Chemical Synthesis: Acts as an intermediate for creating complex molecules used in analytical chemistry and material science.

Basic Information

Product Name	Disodium 4,5-Dihydro-5-Oxo-4-(Phenylazo)-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate
CAS No.	1934-22-1
Molecular Formula	C16H11N4Na2O6S
Molecular Weight	424.32 g/mol
Synonyms	Acid Yellow 117; C.I. 24820; Disodium 5-oxo-4-(phenylazo)-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-4-(phenylazo)-1-(4-sulfophenyl)-, disodium salt; Tartrazine Impurity A; FD&C Yellow 5 Impurity A; 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-[(E)-phenyldiazenyl]-1H-pyrazole-3-carboxylic acid disodium salt
EINECS	217-704-2

Quality Control

Our Disodium 4,5-Dihydro-5-Oxo-4-(Phenylazo)-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate is produced under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed against stringent in-house specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance protocols.

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). Keep away from incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange-yellow 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
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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