Description

Trisodium 7-Acetamido-4-Hydroxy-3-[[2-Sulphonato-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. Its multi-sulfonated structure provides excellent solubility and substantivity, making it a critical component for achieving specific hues and performance characteristics in demanding applications. This compound is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries seeking reliable and consistent colorant precursors.

Application

• Textile Dyeing: As a key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of pigments for inks in packaging, printing, and writing instruments.
• Leather Coloring: Serves as a precursor for dyes used in the tanning and finishing of leather goods.
• Paper Coloring: Employed in the manufacture of dyes for specialty papers and cardboard.
• Biological Staining: Potential use as an intermediate for histochemical stains and indicators in laboratory settings.
• Research & Development: Used as a standard or building block in chemical research for novel chromophore development.

Basic Information

Item	Detail
Product Name	Trisodium 7-Acetamido-4-Hydroxy-3-[[2-Sulphonato-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate
CAS No.	85135-90-6
Molecular Formula	C24H14N5Na3O13S3
Molecular Weight	777.52 g/mol
Synonyms	7-Acetamido-4-hydroxy-3-({2-sulfo-4-[(4-sulfophenyl)diazenyl]phenyl}diazenyl)naphthalene-2-sulfonic acid trisodium salt; Trisodium 1-(4-acetamido-6-hydroxy-3-sulfo-2-naphthylazo)-2-(4-sulfophenylazo)-benzene-3,4'-disulfonate; C.I. Acid Red 337; Azo dye intermediate 85135-90-6; Reactive dye precursor; Water-soluble azo dye salt.
EINECS	Contact for details

Quality Control

Our production of Trisodium 7-Acetamido-4-Hydroxy-3-[[2-Sulphonato-4-[(4-Sulphonatophenyl)Azo]Phenyl]Azo]Naphthalene-2-Sulphonate adheres to a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chromatic performance, and batch-to-batch reproducibility suitable for industrial synthesis. Certificates of Analysis (COA) detailing purity, impurity profile, and physical specifications are available upon request.

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 material is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which may affect performance.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (Karl Fischer)	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 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.