Description

Sodium 5-Chloro-4-[4-[(2-Chlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Toluene-3-Sulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for its role in creating specific, high-performance shades with excellent light and wash fastness properties in demanding applications. It is primarily needed by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent colorant precursors.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Manufacturing: Used in the production of pigments for industrial inks, including packaging and textile printing inks.
• Specialty Coatings: Serves as a colorant precursor in coatings for plastics, leather, and paper products.
• Liquid Crystal Displays (LCDs): Potential use in the synthesis of dyes for color filters in electronic displays.
• Biological Staining: May be utilized in the development of histological stains for microscopy.
• Research & Development: Acts as a building block for novel organic compounds in academic and industrial R&D laboratories.

Basic Information

Product Name	Sodium 5-Chloro-4-[4-[(2-Chlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Toluene-3-Sulphonate
CAS No.	6359-55-3
Molecular Formula	C17H12Cl2N4NaO4S
Molecular Weight	461.27 g/mol
Synonyms	5-Chloro-4-[4-[(2-chlorophenyl)azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-2-methylbenzenesulfonic acid sodium salt; C.I. Reactive Orange 13; Reactive Orange 13; Sodium 1-(5-chloro-4-methyl-2-sulfophenyl)-4-[(2-chlorophenyl)azo]-3-methyl-5-pyrazolone; 1-(5-Chloro-4-methyl-2-sulfophenyl)-3-methyl-4-[(2-chlorophenyl)azo]-5-pyrazolone sodium salt; 2-Methyl-5-chloro-4-[4-[(2-chlorophenyl)azo]-3-methyl-5-oxo-1-pyrazolin-1-yl]benzenesulfonic acid sodium salt; Benzenesulfonic acid, 5-chloro-4-[4-[(2-chlorophenyl)azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-2-methyl-, sodium salt
EINECS	228-787-6

Quality Control

Our Sodium 5-Chloro-4-[4-[(2-Chlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Toluene-3-Sulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and performance. Certificates of Analysis (COA) documenting key 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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture (KF)	≤ 5.0%
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.