Description

Trisodium 2-[4-[[4-[[4-[(4-Amino-2-Methylphenyl)Azo]Benzoyl]Amino]-3-Sulphonatophenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzene-1,4-Disulphonate is a high-purity, water-soluble azo dye intermediate characterized by its multiple sulphonate groups, which impart excellent solubility and substantivity. This compound is essential for synthesizing high-value, wash-fast, and light-stable dyes used in demanding industrial applications. It is primarily required by manufacturers in the textile, leather, ink, and specialty paper industries seeking to produce vibrant and durable colorants.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-performance reactive dyes used in cotton and cellulose fiber dyeing.
• Direct Dye Production: Used in the manufacture of direct dyes for paper coloring and textile applications requiring good wet fastness.
• Leather Dyeing: An important component in the formulation of dyes for leather, providing deep, uniform shades.
• Inkjet Ink Formulations: Serves as a precursor for pigments and dyes used in high-quality industrial and textile inkjet inks.
• Functional Dye Synthesis: Used in research and production of dyes for non-textile applications, such as sensors or optical materials.
• Biological Staining: Potential use as an intermediate for developing specialized stains in histology and microscopy.

Basic Information

Product Name	Trisodium 2-[4-[[4-[[4-[(4-Amino-2-Methylphenyl)Azo]Benzoyl]Amino]-3-Sulphonatophenyl]Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzene-1,4-Disulphonate
CAS No.	94200-35-8
Molecular Formula	C34H24N8Na3O13S3
Molecular Weight	902.76 g/mol
Synonyms	Acid Red 337 (sodium salt); C.I. 17200; Trisodium 6-hydroxy-5-[[4-[[4-[(4-amino-2-methylphenyl)azo]benzoyl]amino]-3-sulfophenyl]azo]-4-[[4-sulfophenyl]azo]-3-methyl-1H-pyrazole-1-benzenesulfonate; Reactive Red 180 related intermediate; Benzenesulfonic acid, 2-[4-[[4-[[4-[(4-amino-2-methylphenyl)azo]benzoyl]amino]-3-sulfophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-, trisodium salt; Azo dye intermediate 94200-35-8
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with each shipment to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Reddish-brown to dark 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.