Description

Trisodium 7-[[4-[[2-Methyl-4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Phenyl]Azo]Naphthalene-1,3-Disulphonate is a high-purity, water-soluble anionic azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing vibrant and stable dyes and pigments, particularly for demanding applications requiring excellent light and wash fastness. This compound is essential for manufacturers in the textile, leather, ink, and specialty paper industries seeking to produce high-quality colorants. We supply this intermediate with a focus on consistent batch-to-batch quality and reliable global supply chain logistics.

Application

• Textile Dyeing: A critical intermediate for the synthesis of reactive, direct, and acid dyes used on cotton, wool, silk, and nylon fibers.
• Leather Coloring: Used in the production of dyes for imparting deep, uniform colors to leather goods with good adhesion.
• Ink Manufacturing: Serves as a key component in formulating inks for jet printing, packaging, and security applications.
• Paper Dyeing: Employed in the creation of dyes for specialty papers, including decorative and colored paper products.
• Pigment Synthesis: Acts as a foundational molecule for manufacturing high-performance organic pigments used in plastics and coatings.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.

Basic Information

Product Name	Trisodium 7-[[4-[[2-Methyl-4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Phenyl]Azo]Naphthalene-1,3-Disulphonate
CAS No.	68084-12-8
Molecular Formula	C24H17N5Na3O9S3
Molecular Weight	716.57 g/mol
Synonyms	7-[[4-[[2-Methyl-4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Phenyl]Azo]naphthalene-1,3-disulfonic Acid Trisodium Salt; Trisodium 1,3-Naphthalenedisulfonate Azo Dye Intermediate; C.I. Acid Orange 156 (related); Azo Dye Intermediate 68084-12-8; Light-sensitive Azo Dye Precursor; Water-soluble Anionic Dye Intermediate; Reactive Dye Intermediate; Direct Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of Trisodium 7-[[4-[[2-Methyl-4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Phenyl]Azo]Naphthalene-1,3-Disulphonate adheres to a stringent quality management system to ensure product integrity and performance consistency. Each batch is analyzed using advanced techniques including HPLC and spectrophotometry to verify identity, purity, and color strength. Certificates of Analysis (COA) documenting all critical parameters are provided with every shipment. We support compliance with relevant global regulatory frameworks, including REACH.

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 and heat sources. The product is light-sensitive; prolonged exposure to light should be avoided to prevent degradation.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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