Description

Disodium 4-[(5-Chloro-4-Methyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate is a high-purity azo dye intermediate essential for producing vibrant and stable colorants. Its value lies in its consistent molecular structure, which ensures predictable and reliable performance in demanding synthesis processes. This compound is primarily needed by manufacturers in the dye and pigment industries, as well as by research institutions developing advanced colorimetric applications.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of high-performance red and orange azo dyes and pigments.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers, including cotton, wool, and nylon.
• Ink Manufacturing: Serves as a precursor for pigments used in printing inks for packaging, publications, and textiles.
• Pigment Production: Integral to manufacturing organic pigments for paints, plastics, and coatings that require excellent color strength and lightfastness.
• Research & Development: Utilized in chemical research for developing new chromophores and studying azo coupling reactions.
• Specialty Colorants: Potential use in the formulation of specialty colorants for leather, paper, and other industrial applications.

Basic Information

Product Name	Disodium 4-[(5-Chloro-4-Methyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate
CAS No.	3564-21-4
Molecular Formula	C18H11ClN2Na2O6S
Molecular Weight	464.79 g/mol
Synonyms	Disodium 5-Chloro-4-methyl-2-[(3-hydroxy-2-naphthoyl)azo]benzenesulfonate; C.I. Pigment Red 57:1 (precursor); 4-[(5-Chloro-4-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthoic acid disodium salt; 5-Chloro-4-methyl-2-[(3-hydroxy-2-naphthoyl)azo]benzenesulfonic acid disodium salt; Azo dye intermediate 3564-21-4; Disodium 3-hydroxy-4-[(5-chloro-4-methyl-2-sulfonatophenyl)azo]-2-naphthoate; Lithol Rubine BCA precursor
EINECS	222-627-6

Quality Control

Our production of Disodium 4-[(5-Chloro-4-Methyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. The material is subjected to rigorous analytical testing, including HPLC for assay and impurity profiling, to meet exacting customer specifications. Certificates of Analysis (COA) detailing all quality parameters are provided with each 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 controlled room temperature (15-25°C). Keep the container tightly sealed when not in use to protect from moisture and contamination. Store away from incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown to dark red 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)	Total impurities ≤ 3.0%
Solubility	Soluble in water

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