Description

Disodium 5-[(4-Hydroxyphenyl)Azo]-8-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo and sulphonate groups, provides excellent chromophoric properties and water solubility, making it a critical precursor for manufacturing specialized colorants. This compound is primarily required by manufacturers in the textile, ink, and specialty polymer industries seeking to produce vivid, stable dyes and pigments with specific performance characteristics.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-performance, water-soluble azo dyes for textile fibers, particularly polyamide and protein-based fibers.
• Specialty Ink Formulations: Used in the production of colorants for inks requiring specific lightfastness and solubility profiles, including certain jet printing and packaging inks.
• Functional Polymer Additive: Can be incorporated as a chromophore monomer or additive in the synthesis of specialty polymers where color is an intrinsic property.
• Research & Development: Employed in chemical R&D laboratories for developing new colorants, studying azo coupling reactions, and creating analytical reagents.
• Industrial Pigment Synthesis: Acts as a precursor in the manufacture of certain lake pigments and toners used in plastics and coatings.

Basic Information

Product Name	Disodium 5-[(4-Hydroxyphenyl)Azo]-8-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	85283-58-5
Molecular Formula	C34H22N6Na2O10S2
Molecular Weight	800.73 g/mol
Synonyms	Acid Red 337; C.I. 17210; Disodium 8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-5-[(4-hydroxyphenyl)azo]-2,7-naphthalenedisulfonate; 2,7-Naphthalenedisulfonic acid, 5-[(4-hydroxyphenyl)azo]-8-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-, disodium salt; Azo dye intermediate 85283-58-5; C.I. Acid Red 337; 17210 (C.I. Number)
EINECS	Contact for details

Quality Control

Our production of Disodium 5-[(4-Hydroxyphenyl)Azo]-8-[[4-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Naphthalene-2-Sulphonate adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent composition and performance. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided with each shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product stability and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
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.