Description

Disodium 3,3'-[(2,2'-Dimethyl[1,1'-Biphenyl]-4,4'-Diyl)Bis[Azo(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazole-4,1-Diyl)]]Bis[4-Chlorobenzenesulphonate] is a high-purity, synthetic organic compound belonging to the class of azo pyrazolone dyes. This chemical is valued for its excellent color strength and stability, making it a critical component in demanding industrial applications. It is primarily sought after by manufacturers in the textile, ink, and specialty coatings industries who require consistent and reliable colorants for their high-performance products.

Application

• Textile Dyeing: Used as a key dye for synthetic fibers like polyester and nylon, offering good wash and light fastness.
• Ink Formulation: Serves as a pigment or dye in the production of printing inks for packaging, publications, and textiles.
• Industrial Coatings: Incorporated into coatings and paints for plastics, metals, and other substrates requiring vibrant and durable coloration.
• Plastics and Masterbatch: Employed for coloring a wide range of plastic polymers during manufacturing.
• Leather Finishing: Used in dyes and finishes for leather goods to achieve specific color shades.
• Paper Coloring: Applied in specialty paper production where high color fidelity is required.

Basic Information

Product Name	Disodium 3,3'-[(2,2'-Dimethyl[1,1'-Biphenyl]-4,4'-Diyl)Bis[Azo(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazole-4,1-Diyl)]]Bis[4-Chlorobenzenesulphonate]
CAS No.	89923-60-4
Molecular Formula	C40H28Cl2N8Na2O10S2
Molecular Weight	937.70 g/mol
Synonyms	Pigment Yellow 191; C.I. 18795; Disodium 4,4'-[3,3'-dimethyl[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[5-chloro-4-hydroxy-3-methyl-1H-pyrazole-1-sulphonate]; C.I. Pigment Yellow 191:1; Yellow 191; 4,4'-[3,3'-Dimethyl(1,1'-biphenyl)-4,4'-diylbis(azo)]bis[5-chloro-4-hydroxy-3-methyl-1H-pyrazole-1-sulfonic acid] disodium salt
EINECS	Contact for details

Quality Control

Our production of Disodium 3,3'-[(2,2'-Dimethyl[1,1'-Biphenyl]-4,4'-Diyl)Bis[Azo(4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazole-4,1-Diyl)]]Bis[4-Chlorobenzenesulphonate] adheres to stringent quality control protocols to ensure batch-to-batch consistency and meets the high standards required for industrial colorants. Each lot is analyzed for critical parameters including color strength, shade, and purity. Certificates of Analysis (COA) documenting these specifications are available upon request to support your quality assurance and regulatory compliance needs.

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 incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Shade	Within agreed tolerance
Moisture Content	≤ 5.0%
Ash Content	≤ 1.0%
Water Solubility	Soluble

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