Description

1H-Pyrazole-3-carboxylic acid, 1-[3-[[4-chloro-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-methyl-5-sulfophenyl]-4-[[4-[[4-chloro-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-4,5-dihydro-5-oxo-, tetrasodium is a high-purity, water-soluble reactive dye intermediate of significant commercial importance. This compound is valued for its ability to form strong covalent bonds with cellulosic fibers, resulting in exceptional wash and light fastness properties. It is a critical raw material for manufacturers of reactive dyes targeting the textile, leather, and specialty paper industries.

Application

• Primary Intermediate for Reactive Dyes: Serves as the key chromophore and reactive component in the synthesis of high-performance reactive dyes for cotton, viscose, and other cellulosic fabrics.
• Textile Dyeing and Printing: Used in the production of dyes for exhaust, continuous, and printing applications, offering brilliant shades with excellent fastness.
• Leather Coloring: Employed in the formulation of dyes for high-quality leather finishing, providing deep, uniform color penetration.
• Paper Industry: Utilized in the manufacture of specialty dyes for coloring paper products where high wet-fastness is required.
• Research & Development: Acts as a building block for chemists developing novel dye structures and studying dye-fiber interactions.
• Ink Formulations: Potential use in the development of specialized inks where chemical bonding to the substrate is advantageous.

Basic Information

Product Name	1H-Pyrazole-3-carboxylic acid, 1-[3-[[4-chloro-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-methyl-5-sulfophenyl]-4-[[4-[[4-chloro-6-[(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-4,5-dihydro-5-oxo-, tetrasodium
CAS No.	71002-16-9
Molecular Formula	C40H22Cl2N16O14S4 · 4Na
Molecular Weight	Contact for details
Synonyms	Reactive Black 5 (Tetrasodium Salt); C.I. Reactive Black 5; Remazol Black B; Tetrasodium 4-amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-6-(phenylamino)-2,7-naphthalenedisulfonate (related isomer); Lanasol Black B; Sumifix Black B; Drimarene Black B; Levafix Black EB
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and performance. Certificates of Analysis (COA) detailing purity, strength, and impurity profiles are provided with each shipment to guarantee it meets your specific application requirements.

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). This material is hygroscopic (moisture-sensitive); keep the original container tightly sealed to prevent absorption of atmospheric moisture, which can affect performance.

Specification

Item	Specification
Appearance	Black to dark blue powder or granules
Identification (HPLC/IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100% ± 3% (vs. Standard)
Solubility in Water	Complete solution
Moisture Content	Max. 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	Max. 20 ppm

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