Description

Disodium 2-[[1-(2-Chloro-5-Sulphonatophenyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonate CAS NO 6359-95-1 is a high-purity, water-soluble azo dye intermediate characterized by its distinct chemical structure. This compound is essential for synthesizing vivid and stable colorants, particularly in applications demanding high lightfastness and chemical resistance. It is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries seeking to produce high-performance pigments and dyes.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing and printing.
• Textile Colorant Production: Manufacture of azo pigments and dyes for wool, silk, and nylon, offering excellent wash and rub fastness.
• Inkjet and Printing Inks: Used in the formulation of advanced inks for digital textile printing and industrial marking, providing brilliant color yield.
• Specialty Coatings and Paints: Imparts durable coloration to industrial paints, lacquers, and coatings where UV stability is required.
• Paper and Leather Dyeing: Employed in the coloration of specialty papers and leather goods.
• Research and Development: Serves as a precise chemical reagent in R&D labs for developing new chromophores and studying azo chemistry.

Basic Information

Product Name	Disodium 2-[[1-(2-Chloro-5-Sulphonatophenyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonate
CAS No.	6359-95-1
Molecular Formula	C20H12ClN3Na2O8S2
Molecular Weight	567.89 g/mol
Synonyms	2-[[1-(2-Chloro-5-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-1-naphthalenesulfonic acid disodium salt; C.I. Reactive Red 2; Reactive Red 2; Disodium 5-[(4,5-dihydro-3-methyl-5-oxo-1-(2-chloro-5-sulfophenyl)-1H-pyrazol-4-yl)azo]-4-hydroxy-2,7-naphthalenedisulfonate; 1-Naphthalenesulfonic acid, 2-[[1-(2-chloro-5-sulfophenyl)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-4-yl]azo]-, disodium salt; Levafix Red E-2B; Procion Red MX-2B
EINECS	228-787-8

Quality Control

Our Disodium 2-[[1-(2-Chloro-5-Sulphonatophenyl)-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-4-Yl]Azo]Naphthalene-1-Sulphonate is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for dye intermediate applications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical parameters are provided with each shipment to guarantee traceability and consistency for our global B2B clients.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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