Description

Trisodium 7-[[4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Naphthalene-1,3-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing vibrant and stable acid dyes and reactive dyes used in textile coloration. This compound is essential for manufacturers and R&D laboratories in the dye and pigment industry, particularly those focused on producing dyes for wool, silk, nylon, and paper. Consistent quality and reliable supply of this intermediate are critical for ensuring batch-to-batch color consistency in final dye products.

Application

• Primary intermediate for the synthesis of acid dyes used on protein fibers like wool and silk.
• Key building block in the production of high-quality reactive dyes for cotton and cellulose fibers.
• Used in the manufacture of dyes for paper coloring and specialty inks.
• Employed as a colorant intermediate in the production of leather dyes.
• Acts as a precursor for dyes used in the food coloring sector (where specific purity grades are met).
• Serves as a research chemical in academic and industrial laboratories for developing new chromophores.
• Potential use in the synthesis of dyes for biological staining applications in histology.

Basic Information

Item	Details
Product Name	Trisodium 7-[[4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Naphthalene-1,3-Disulphonate
CAS No.	68084-13-9
Molecular Formula	C17H12N3Na3O9S3
Molecular Weight	599.43 g/mol
Synonyms	7-[[4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Naphthalene-1,3-Disulphonic Acid Trisodium Salt; Acid Orange 67; C.I. 14172; Trisodium 4-[(4-((sulfomethyl)amino)phenyl)azo]-1,3-naphthalenedisulfonate; 1,3-Naphthalenedisulfonic acid, 7-((4-((sulfomethyl)amino)phenyl)azo)-, trisodium salt; Azo dye intermediate 68084-13-9; Orange acid dye intermediate
EINECS	Contact for details

Quality Control

Our Trisodium 7-[[4-[(Sulphonatomethyl)Amino]Phenyl]Azo]Naphthalene-1,3-Disulphonate is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles typical for dye intermediates. Certificates of Analysis (COA) documenting key parameters are available upon request. We can support compliance needs for various market standards.

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). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture and degradation.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 20 ppm
pH (1% Solution)	7.0 - 9.0

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