Description

1-(5-Amino-2-Methyl-3-Sulphophenyl)-4,5-Dihydro-5-Oxo-4-[(2-Sulphophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid is a high-purity, water-soluble azo pyrazole carboxylic acid derivative, serving as a critical advanced intermediate for the synthesis of high-performance dyes and pigments. Its value lies in providing the essential chromophore and functional group architecture required for producing vivid, lightfast, and washfast colorants. This compound is primarily needed by manufacturers in the specialty chemicals, textile dye, and ink industries seeking to develop superior coloring agents.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-quality reactive dyes for cotton and cellulose fiber dyeing and printing.
• Production of Acid Dyes: Used in manufacturing acid dyes for coloring wool, silk, and nylon, offering excellent brightness and levelness.
• Pigment Synthesis: Serves as a precursor for organic pigments used in inks, plastics, and coatings, providing enhanced color strength and durability.
• Specialty Colorant Development: Enables the creation of custom, high-value colorants for niche applications in electronics and advanced materials.
• Research & Development: A vital compound for R&D laboratories focusing on novel dye structures and photophysical properties.

Basic Information

Product Name	1-(5-Amino-2-Methyl-3-Sulphophenyl)-4,5-Dihydro-5-Oxo-4-[(2-Sulphophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid
CAS No.	85153-43-1
Molecular Formula	C18H15N5O8S2
Molecular Weight	493.47 g/mol
Synonyms	5-Amino-4-(2-sulfophenyl)azo-3-methyl-1-(3-sulfophenyl)-1H-pyrazole-4,5-dihydro-5-one-3-carboxylic acid; 1H-Pyrazole-3-carboxylic acid, 1-(5-amino-2-methyl-3-sulfophenyl)-4,5-dihydro-5-oxo-4-[(2-sulfophenyl)azo]-; C.I. Reactive Yellow 145 intermediate; Azo pyrazole carboxylic acid sulfonate; Reactive dye intermediate 85153-43-1; 4,5-Dihydro-5-oxo-1-(5-amino-2-methyl-3-sulfophenyl)-4-[(2-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing all specification parameters are provided and available upon request 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 a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to Brown Powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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