Description

Disodium 7-Hydroxy-8-[[4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1,3-Disulphonate is a high-purity, synthetic organic dye intermediate of significant industrial importance. Its complex molecular structure provides excellent chromophoric properties, making it a critical precursor for the production of high-performance dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to develop vibrant and stable colorants.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of high-value, complex azo dyes for textiles and fibers.
• Pigment Manufacturing: Used in the production of organic pigments for industrial paints, inks, and plastics coloration.
• Specialty Colorants: Employed in the formulation of specialized dyes for leather, paper, and other substrates requiring high color fastness.
• Research & Development: A valuable compound for R&D laboratories focusing on novel chromophores and dye chemistry.
• Functional Dyes: Potential applications in the development of dyes for non-textile uses, such as in optical data storage or laser dyes.

Basic Information

Product Name	Disodium 7-Hydroxy-8-[[4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1,3-Disulphonate
CAS No.	3567-65-5
Molecular Formula	C41H26N4Na2O11S3
Molecular Weight	892.81 g/mol
Synonyms	Acid Red 337; C.I. 17210; Disodium 7-hydroxy-8-[[4'-[[4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]naphthalene-1,3-disulfonate; 7-Hydroxy-8-[[4'-[[4-[[(p-tolyl)sulfonyl]oxy]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-1,3-naphthalenedisulfonic acid disodium salt; Azo dye intermediate 3567-65-5; C.I. Acid Red 337
EINECS	Contact for details

Quality Control

Our production of Disodium 7-Hydroxy-8-[[4'-[[4-[[(p-Tolyl)Sulphonyl]Oxy]Phenyl]Azo][1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-1,3-Disulphonate adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure consistent performance and batch-to-batch reliability. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment.

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 heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

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
Solubility	Soluble in water

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