Description

5-Chloro-2-Hydroxy-3-[[3-Methyl-5-Oxo-1-(m-Sulphophenyl)-2-Pyrazolin-4-Yl]Azo]Benzenesulphonic Acid is a high-purity azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for manufacturers requiring precise molecular structures to achieve specific shades and fastness properties in their final products. It is primarily needed by the textile, leather, and specialty chemical industries for synthesizing reactive and acid dyes.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-quality reactive dyes for cotton and other cellulosic fibers.
• Acid Dye Production: Used in manufacturing acid dyes for coloring wool, silk, and nylon with excellent wash and light fastness.
• Leather Dyeing: Employed in the formulation of dyes for leather finishing, providing rich, durable colors.
• Specialty Pigments: Serves as a precursor for creating complex organic pigments used in inks and coatings.
• Research & Development: Utilized in chemical R&D for developing new chromophores and studying azo dye chemistry.
• Textile Printing: Integral component in dyes formulated for textile printing processes.

Basic Information

Product Name	5-Chloro-2-Hydroxy-3-[[3-Methyl-5-Oxo-1-(m-Sulphophenyl)-2-Pyrazolin-4-Yl]Azo]Benzenesulphonic Acid
CAS No.	29194-44-3
Molecular Formula	C16H11ClN4O8S2
Molecular Weight	494.87 g/mol
Synonyms	5-Chloro-2-hydroxy-3-[(3-methyl-5-oxo-1-(3-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl)diazenyl]benzenesulfonic acid; C.I. Reactive Orange 13 intermediate; 4-[(5-Chloro-2-hydroxy-3-sulfophenyl)azo]-3-methyl-1-(3-sulfophenyl)-2-pyrazolin-5-one; 29194-44-3; Benzenesulfonic acid, 5-chloro-2-hydroxy-3-[[3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]azo]-; Reactive Orange 13 dye intermediate
EINECS	Contact for details

Quality Control

Our 5-Chloro-2-Hydroxy-3-[[3-Methyl-5-Oxo-1-(m-Sulphophenyl)-2-Pyrazolin-4-Yl]Azo]Benzenesulphonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye intermediate applications. Certificates of Analysis (COA) documenting all critical parameters are 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 room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Orange to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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