Description

Disodium 6-[(2,4-Dimethyl-6-Sulphonatophenyl)Azo]-5-Hydroxynaphthalene-1-Sulphonate is a high-purity, water-soluble azo dye intermediate. This compound is valued for its precise chemical structure and consistent performance in demanding synthesis processes. It is primarily utilized by manufacturers in the dye and pigment industries, as well as in research and development for specialty chemical applications.

Application

• Key intermediate for the synthesis of high-value azo dyes and pigments.
• Used in the production of colorants for textiles, leather, and paper.
• Acts as a precursor for specialty inks and printing applications.
• Employed in research laboratories for developing novel chromophoric systems.
• Potential use in the formulation of analytical reagents and indicators.
• Serves as a standard or reference material for quality control in dye manufacturing.

Basic Information

Product Name	Disodium 6-[(2,4-Dimethyl-6-Sulphonatophenyl)Azo]-5-Hydroxynaphthalene-1-Sulphonate
CAS No.	3257-28-1
Molecular Formula	C18H14N2Na2O8S2
Molecular Weight	496.41 g/mol
Synonyms	Acid Red 337; C.I. 17030; Disodium 5-hydroxy-6-[(2-methyl-4-sulfo-6-methylphenyl)azo]-1-naphthalenesulfonate; 6-[(2,4-Dimethyl-6-sulfophenyl)azo]-5-hydroxy-1-naphthalenesulfonic acid disodium salt; Azo dye intermediate 3257-28-1; 1-Naphthalenesulfonic acid, 6-[(2,4-dimethyl-6-sulfophenyl)azo]-5-hydroxy-, disodium salt
EINECS	221-861-6

Quality Control

Our production of Disodium 6-[(2,4-Dimethyl-6-Sulphonatophenyl)Azo]-5-Hydroxynaphthalene-1-Sulphonate adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity. The material is characterized and tested against established in-house specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance processes.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

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	≤ 20.0%
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.