Description

2-Hydroxy-5-[[4-[[6-hydroxy-2-[3-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]phenyl]-8-sodiosulfo-1H-naphth[1,2-d]imidazol-7-yl]azo]benzoyl]amino]-3-methylbenzoic acid sodium salt is a high-purity, complex azo dye intermediate essential for producing vibrant and stable colorants. This compound is valued for its role in synthesizing specialized dyes with excellent light and wash fastness properties. It is primarily required by manufacturers in the textile, ink, and specialty pigment industries seeking to develop high-performance coloring agents.

Application

• Primary Intermediate for Azo Dyes: Serves as a critical building block in the synthesis of high-grade, polyazo direct and reactive dyes.
• Textile Dyeing: Used in the production of dyes for coloring cotton, wool, silk, and nylon, offering deep shades and good fastness.
• Ink Manufacturing: A key component in formulating inks for packaging, security printing, and digital applications requiring specific color properties.
• Specialty Pigments: Employed in the creation of pigments for plastics, coatings, and artistic materials where color stability is paramount.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying structure-color relationships.
• Biological Staining: Potential use as a precursor for histological stains and indicators in analytical chemistry.

Basic Information

Item	Details
Product Name	2-Hydroxy-5-[[4-[[6-hydroxy-2-[3-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]phenyl]-8-sodiosulfo-1H-naphth[1,2-d]imidazol-7-yl]azo]benzoyl]amino]-3-methylbenzoic acid sodium salt
CAS No.	6598-53-4
Molecular Formula	C46H28N8Na3O14S2
Molecular Weight	1065.86 g/mol
Synonyms	Acid Red 337; C.I. 17210; 2-Hydroxy-5-{[4-({6-hydroxy-2-[3-({1-hydroxy-4-[(sodium oxido)sulfonyl]-2-naphthyl}diazenyl)phenyl]-8-[(sodium oxido)sulfonyl]-1H-naphtho[1,2-d]imidazol-7-yl}diazenyl)benzoyl]amino}-3-methylbenzoic acid sodium salt; Benzoic acid, 2-hydroxy-5-[[4-[[6-hydroxy-2-[3-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]phenyl]-8-sodiosulfo-1H-naphth[1,2-d]imidazol-7-yl]azo]benzoyl]amino]-3-methyl-, sodium salt; Sodium 5-[(4-{[7-({4-[(2-carboxy-6-methyl-4-oxidophenoxy)carbonylamino]-2-hydroxyphenyl}diazenyl)-6-hydroxy-2-{3-[1-hydroxy-4-(sulfonatooxy)naphthalen-2-yl]diazenyl}-1H-naphtho[1,2-d]imidazol-3-ium-8-yl]diazenyl}benzoyl)amino]-2-hydroxy-3-methylbenzoate
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity. Quality is verified through comprehensive analytical methods including HPLC, UV-Vis spectroscopy, and elemental analysis. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every 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 a controlled room temperature (15-25°C). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, handling should be conducted under subdued lighting where practical.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (Water)	Partially soluble

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