Description

2-[[6-[[(2-Carboxyphenyl)Amino]Sulfonyl]-2-Hydroxy-1-Naphthalenyl]Azo]Benzoic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chelating properties and its role as a key precursor in the synthesis of specialized dyes and pigments. It is primarily required by manufacturers in the dyestuff, textile, and analytical chemistry industries for producing colorants and as a metallochromic indicator.

Application

• Dye and Pigment Intermediate: A crucial precursor for manufacturing specific azo dyes and lake pigments used in textiles, inks, and coatings.
• Metallochromic Indicator: Used in analytical chemistry for the complexometric titration of metal ions, such as calcium and magnesium, due to its color change upon chelation.
• Textile Colorant Synthesis: Employed in the production of dyes for coloring natural and synthetic fibers.
• Research & Development: Serves as a standard or reagent in chemical research for studying azo coupling reactions and chelation chemistry.
• Specialty Chemical Production: Used in formulating specialized chemical products where metal ion detection or specific coloration is required.

Basic Information

Product Name	2-[[6-[[(2-Carboxyphenyl)Amino]Sulfonyl]-2-Hydroxy-1-Naphthalenyl]Azo]Benzoic Acid Disodium Salt
CAS No.	5850-46-4
Molecular Formula	C24H15N3O7S·2Na
Molecular Weight	535.43 g/mol
Synonyms	Acid Chrome Blue K; Calcon; 1-(2-Hydroxy-1-naphthylazo)-2-hydroxy-4-sulfo-naphthalene-1'-azo-2'-benzene-carboxylic acid disodium salt; Mordant Blue 13; Eriochrome Blue Black R; Calconcarboxylic acid, disodium salt; CI 16675; 2-Hydroxy-1-(2-hydroxy-4-sulfo-1-naphthylazo)-naphthalene-3-carboxylic acid
EINECS	227-456-0

Quality Control

Our production of 2-[[6-[[(2-Carboxyphenyl)Amino]Sulfonyl]-2-Hydroxy-1-Naphthalenyl]Azo]Benzoic Acid Disodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. The product is manufactured in facilities following cGMP guidelines, and each lot is supported by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles. We commit to meeting the specifications required for both industrial and reagent-grade applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0

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