Description

Disodium 4-[(4-Chloro-5-Methyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate is a high-purity, water-soluble azo dye intermediate and pigment. This compound is valued for its ability to impart a strong, stable colorant structure, making it a critical precursor in the synthesis of high-performance dyes and pigments. It is primarily required by manufacturers in the textile, ink, and specialty coatings industries seeking consistent quality and reliable supply for their production processes.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloration.
• Key component in manufacturing printing inks for packaging and commercial printing.
• Used in the production of industrial coatings and colorants for plastics.
• Potential use as a biological stain or histochemical reagent in laboratory settings.
• Employed in research and development for novel functional dyes and photonic materials.

Basic Information

Product Name	Disodium 4-[(4-Chloro-5-Methyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate
CAS No.	5858-82-2
Molecular Formula	C18H11ClN2Na2O6S
Molecular Weight	464.78 g/mol
Synonyms	Disodium 4-[(4-Chloro-5-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylate; C.I. Pigment Red 57:1 Intermediate; 4-[(4-Chloro-5-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid disodium salt; Azoic Diazo Component 13; Naphthol AS-BS Base; 2-Naphthalenecarboxylic acid, 4-[(4-chloro-5-methyl-2-sulfophenyl)azo]-3-hydroxy-, disodium salt
EINECS	227-483-1

Quality Control

Our production of Disodium 4-[(4-Chloro-5-Methyl-2-Sulphonatophenyl)Azo]-3-Hydroxy-2-Naphthoate adheres to stringent quality management systems to ensure batch-to-batch consistency and purity. The material is characterized and tested against established in-house specifications using advanced analytical techniques. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each 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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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