Description

Dipotassium hydrogen 4-[[4,5-dihydro-3-methyl-5-oxo-1-[4-[[[2-(sulphonatooxy)ethyl]amino]sulphonyl]phenyl]-1H-pyrazol-4-yl]azo]-N-[2-(sulphonatooxy)ethyl]toluene-2-sulphonamidate is a high-purity, water-soluble anionic dye intermediate characterized by its complex sulfonated azo-pyrazole structure. This compound is engineered for exceptional color strength and stability, making it a critical component for producing high-performance dyes and pigments. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries seeking reliable and consistent chromophores.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes for cotton, wool, and nylon fibers.
• Textile Colorant Production: Used in manufacturing dyes for textiles requiring excellent wash-fastness and light-fastness properties.
• Inkjet and Printing Inks: Serves as a chromophore component in the formulation of advanced inks for digital and industrial printing.
• Specialty Pigments and Coatings: Employed in creating pigments for automotive, industrial, and decorative coatings where color consistency is paramount.
• Biological Staining Reagents: Potential use as a precursor for developing specialized stains in histological and cytological applications.
• Research & Development: Used in chemical R&D for studying azo dye chemistry and developing new colorant molecules.

Basic Information

Product Name	Dipotassium hydrogen 4-[[4,5-dihydro-3-methyl-5-oxo-1-[4-[[[2-(sulphonatooxy)ethyl]amino]sulphonyl]phenyl]-1H-pyrazol-4-yl]azo]-N-[2-(sulphonatooxy)ethyl]toluene-2-sulphonamidate
CAS No.	83400-00-4
Molecular Formula	C24H24K2N6O14S3
Molecular Weight	858.93 g/mol
Synonyms	Reactive Black 5 Dipotassium Salt; C.I. Reactive Black 5; Remazol Black B; Dipotassium 4-amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfamoyl]phenyl]azo]-6-(phenylazo)naphthalene-2,7-disulfonate (related structure); 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[[4-[[2-(sulfooxy)ethyl]sulfamoyl]phenyl]azo]-6-(phenylazo)-, dipotassium salt; Lanasol Black B; Sumifix Black B
EINECS	Contact for details

Quality Control

Our dipotassium hydrogen 4-[[4,5-dihydro-3-methyl-5-oxo-1-[4-[[[2-(sulphonatooxy)ethyl]amino]sulphonyl]phenyl]-1H-pyrazol-4-yl]azo]-N-[2-(sulphonatooxy)ethyl]toluene-2-sulphonamidate is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for color value, purity, and ionic content. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee consistency and 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect performance and handling.

Specification

Item	Specification
Appearance	Dark blue to black powder or granules
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Water Solubility	Completely 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.