Description

4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a critical precursor for synthesizing high-performance, colorfast dyes and pigments, particularly for demanding textile applications. This compound is essential for manufacturers and R&D laboratories in the dye, textile, and specialty chemical industries seeking to produce vibrant and durable colors.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Textile Colorant Production: Used in the manufacture of azo pigments and dyes for wool, silk, and nylon, offering excellent wash and light fastness.
• Specialty Ink Formulation: Serves as a precursor for pigments used in high-performance inks for packaging and digital printing.
• Laboratory Research & Development: A vital reagent for chemists developing new chromophores and studying azo dye chemistry and properties.
• Industrial Pigment Synthesis: Employed in the production of pigments for plastics, paints, and coatings where specific color properties are required.

Basic Information

Item	Details
Product Name	4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid
CAS No.	84682-07-5
Molecular Formula	C40H28N8O14S4
Molecular Weight	981.00 g/mol
Synonyms	Acid Yellow 40 (Intermediate); C.I. 18950; 4,4'-Bis[(3-methyl-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl)azo]biphenyl-2,2'-disulfonic acid; Direct Yellow GR Intermediate; 1,1'-Biphenyl-2,2'-disulfonic acid, 4,4'-bis[[4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl]azo]-; Yellow GR Base
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Every lot undergoes comprehensive analytical testing, including HPLC for assay and impurity profiling. Certificates of Analysis (COA) documenting identity, purity, and related substances are provided with each shipment to support your quality assurance processes.

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). Keep away from strong oxidizing agents. Due to its complex organic structure, prolonged exposure to elevated temperatures or humidity should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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