Description

6-Hydroxy-5-[[4-[[4-[(4-Methylphenyl)Amino]-3-Sulphophenyl]Azo]-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure is engineered to deliver exceptional color strength and thermal stability in demanding applications. This compound is primarily sought by manufacturers in the textile, ink, and specialty polymer sectors for synthesizing high-performance dyes and pigments.

Application

• Textile Dyeing: A key intermediate for the synthesis of high-grade, wash-fast azo dyes for cotton, wool, and synthetic fibers.
• Ink Manufacturing: Used in producing pigments for industrial inks, including packaging, textile printing, and specialty inks requiring vivid coloration.
• Plastic and Polymer Coloring: Serves as a precursor for organic pigments used to color plastics, masterbatches, and synthetic materials.
• Leather Finishing: Employed in the formulation of dyes for leather goods, providing deep, uniform shades.
• Paper Coloring: Used in the production of dyes for specialty papers and decorative applications.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel dye synthesis, photochemical studies, and material science.

Basic Information

Product Name	6-Hydroxy-5-[[4-[[4-[(4-Methylphenyl)Amino]-3-Sulphophenyl]Azo]-1-Naphthyl]Azo]Naphthalene-2-Sulphonic Acid, Sodium Salt
CAS No.	93964-13-7
Molecular Formula	C33H23N5O7S2•Na
Molecular Weight	696.68 g/mol (as sodium salt)
Synonyms	Acid Red 337 (sodium salt); C.I. 17215; 6-Hydroxy-5-((4-((4-((4-methylphenyl)amino)-3-sulfophenyl)azo)-1-naphthyl)azo)naphthalene-2-sulfonic acid sodium salt; Sodium 6-hydroxy-5-[[4-[[4-[(4-methylphenyl)amino]-3-sulfophenyl]azo]-1-naphthalenyl]azo]-2-naphthalenesulfonate; Polyazo dye intermediate; Azo dye precursor CAS 93964-13-7
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications 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). Keep away from strong oxidizing agents. The material is hygroscopic; ensure containers are sealed after use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Complete, clear solution

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