Description

5-Chloro-3-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxybenzenesulphonic Acid is a high-purity azo dye intermediate and specialty chemical building block, valued for its precise molecular structure and chromophoric properties. This compound is critical for manufacturers requiring consistent quality and reliable supply for advanced synthesis. It is primarily utilized by the dye and pigment industry, as well as research institutions developing novel functional materials.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key precursor in the synthesis of high-performance, color-fast azo dyes used in textiles, inks, and coatings.
• Specialty Chemical Synthesis: Used as a building block in organic synthesis for creating complex molecules with specific optical or electronic properties.
• Research & Development: Employed in academic and industrial R&D labs for studying azo coupling reactions and developing new chromophores.
• Functional Material Production: Potential applications in the development of materials for sensors or light-absorbing layers due to its conjugated structure.

Basic Information

Item	Details
Product Name	5-Chloro-3-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxybenzenesulphonic Acid
CAS No.	25746-81-0
Molecular Formula	C16H13ClN4O5S
Molecular Weight	408.82 g/mol
Synonyms	5-Chloro-2-hydroxy-3-[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)azo]benzenesulfonic acid; Benzenesulfonic acid, 5-chloro-3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-; Azo dye intermediate 25746-81-0; 4-(5-Chloro-2-hydroxy-3-sulfophenylazo)-3-methyl-1-phenyl-2-pyrazolin-5-one
EINECS	Contact for details

Quality Control

Our production of 5-Chloro-3-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxybenzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity and batch-to-batch consistency. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided and available upon request to support your quality assurance processes.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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