Description

4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-4-[(4-Sulphophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid is a high-purity, water-soluble azo pyrazole carboxylic acid derivative, valued for its role as a key synthetic intermediate and functional dye precursor. Its structure provides excellent chromophoric properties and reactivity, making it essential for producing specialized colorants and advanced organic compounds. This chemical is primarily sought by manufacturers in the dye and pigment, pharmaceutical, and fine chemical synthesis industries for its consistent performance and quality.

Application

• Primary Intermediate for Reactive Dyes: A crucial building block in the synthesis of high-quality, wash-fast reactive dyes for textiles, particularly cotton and cellulose fibers.
• Functional Dye & Pigment Synthesis: Used in the manufacture of specialized azo pigments and dyes for inks, coatings, and plastics, offering vibrant color and stability.
• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of certain pharmacologically active pyrazole derivatives and diagnostic agents.
• Research & Development Chemical: Employed in academic and industrial R&D for developing new organic materials, sensors, and colorimetric indicators.
• Fine Chemical Synthesis: Utilized as a versatile intermediate for constructing complex organic molecules in custom synthesis and contract manufacturing.

Basic Information

Product Name	4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-4-[(4-Sulphophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid
CAS No.	34175-08-1
Molecular Formula	C16H12N4O8S2
Molecular Weight	452.42 g/mol
Synonyms	1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-; C.I. Reactive Yellow 15; Reactive Yellow 15; 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid; Pyrazolone derivative, sulfonated azo; 1-(4-Sulfophenyl)-4-[(4-sulfophenyl)azo]-5-pyrazolone-3-carboxylic acid; Acid Yellow 9G (related); Azo pyrazole carboxylic acid disulfonate
EINECS	Contact for details

Quality Control

Our production of 4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-4-[(4-Sulphophenyl)Azo]-1H-Pyrazole-3-Carboxylic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. The material is subjected to rigorous analytical testing, including HPLC for purity and identity confirmation, to meet the exacting standards of the dye and fine chemical industries. Certificates of Analysis (COA) detailing all critical specifications are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear, yellow solution

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