Description

2-Hydroxy-5-[[3-[(2-Hydroxy-5,7-Disulfo-1-Naphtyl)Azo]-4-Methylphenyl]Carbonylamino]Benzoic Acid Trisodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chromophoric properties and ability to form stable complexes with metal ions, making it a critical component in specialized colorant synthesis and chemical analysis. It is primarily required by manufacturers in the dye and pigment industry, as well as by research laboratories for use as a metallochromic indicator and in spectrophotometric applications.

Application

• Dye and Pigment Intermediate: A key precursor for the synthesis of high-value, water-soluble azo dyes and pigments used in textiles, inks, and specialty coatings.
• Metallochromic Indicator: Employed in analytical chemistry as a sensitive colorimetric indicator for the complexometric titration of metal ions such as calcium, magnesium, and rare earth elements.
• Spectrophotometric Reagent: Used in laboratory research for the quantitative determination of specific metal ions via UV-Vis spectroscopy due to its distinct absorption characteristics.
• Biological Staining: Potential application in histological and cytological staining procedures for microscopic analysis.
• Chemical Sensor Development: A functional component in the research and development of optical chemical sensors for environmental or industrial monitoring.
• Catalyst Research: Utilized in studies involving metal-organic frameworks (MOFs) or as a ligand in catalytic systems.

Basic Information

Product Name	2-Hydroxy-5-[[3-[(2-Hydroxy-5,7-Disulfo-1-Naphtyl)Azo]-4-Methylphenyl]Carbonylamino]Benzoic Acid Trisodium Salt
CAS No.	5863-94-5
Molecular Formula	C25H16N3Na3O11S2
Molecular Weight	667.48 g/mol
Synonyms	Acid Chrome Blue K; Chrome Blue K; 2-Hydroxy-5-[(3-[(2-hydroxy-5,7-disulfo-1-naphthyl)azo]-4-methylbenzoyl)amino]benzoic acid trisodium salt; C.I. Mordant Blue 1; Calcon; Eriochrome Blue Black R; Pontachrome Blue Black R; Solochrome Dark Blue; 1-Naphthalenesulfonic acid, 2,2'-[1-[(2-carboxy-4-hydroxyphenyl)carbamoyl]-2-methyl-1,2-ethanediyl]bis[azo]bis[5-hydroxy-, trisodium salt
EINECS	227-511-5

Quality Control

Our 2-Hydroxy-5-[[3-[(2-Hydroxy-5,7-Disulfo-1-Naphtyl)Azo]-4-Methylphenyl]Carbonylamino]Benzoic Acid Trisodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use as a dye intermediate and analytical reagent. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles are available upon request 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). 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	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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