Description

Sodium 3-[[4-[(2-Hydroxy-5-Methylphenyl)Azo]-1-Naphthyl]Azo]Benzenesulphonate is a high-purity azo dye intermediate essential for producing vivid and stable colors. This compound matters for manufacturers requiring precise color formulation and consistent batch-to-batch performance for demanding applications. It is primarily needed by the textile, ink, and specialty coatings industries for dyeing and pigment synthesis.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile dyeing and printing.
• Key component in manufacturing industrial inks for packaging, printing, and coding applications.
• Used in the formulation of specialty coatings and paints requiring specific color properties and lightfastness.
• Potential use as a colorant or intermediate in the production of paper and leather products.
• Employed in research and development laboratories for novel colorant synthesis and material science studies.
• May serve as a chemical reagent in analytical chemistry and diagnostic applications.

Basic Information

Product Name	Sodium 3-[[4-[(2-Hydroxy-5-Methylphenyl)Azo]-1-Naphthyl]Azo]Benzenesulphonate
CAS No.	67875-21-2
Molecular Formula	C23H16N4NaO4S
Molecular Weight	467.45 g/mol
Synonyms	Benzenesulfonic acid, 3-[[4-[(2-hydroxy-5-methylphenyl)azo]-1-naphthalenyl]azo]-, sodium salt; C.I. 26125; Sodium 3-[(4-[(2-hydroxy-5-methylphenyl)azo]-1-naphthyl)azo]benzenesulfonate; Acid Red 337 (related class); Azo dye intermediate 67875-21-2; 3-[(4-[(2-Hydroxy-5-methylphenyl)azo]-1-naphthyl)azo]benzenesulfonic acid sodium salt; 1-Naphthalenesulfonic acid derivative
EINECS	Contact for details

Quality Control

Our production of Sodium 3-[[4-[(2-Hydroxy-5-Methylphenyl)Azo]-1-Naphthyl]Azo]Benzenesulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity, consistent color strength, and precise chemical composition. Comprehensive Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
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.