Description

Tetrasodium 4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo]-5,5'-Dimethyl[1,1'-Biphenyl]-2,2'-Disulphonate is a high-purity, water-soluble azo dye intermediate and functional chemical. It is valued for its strong chromophore and multiple sulphonate groups, which provide excellent water solubility and binding affinity. This compound is essential for manufacturers in the textile, specialty ink, and advanced material coating industries seeking consistent, high-performance colorants and functional additives.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality, wash-fast reactive dyes for cotton, wool, and nylon fibers.
• Specialty Ink Formulations: Used in the production of inks for jet printing, security printing, and other applications requiring precise color and stability.
• Functional Additive for Coatings: Imparts specific optical or functional properties in advanced industrial and decorative coatings.
• Research & Development: Serves as a critical reagent in chemical research for developing new chromophores and functional materials.
• Paper Coloring: Employed in the manufacture of specialty colored papers where high color strength and uniformity are required.
• Biological Staining Agent: Potential use as a staining agent in histological and cytological applications due to its specific affinity.

Basic Information

Product Name	Tetrasodium 4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo]-5,5'-Dimethyl[1,1'-Biphenyl]-2,2'-Disulphonate
CAS No.	89504-75-6
Molecular Formula	C44H32N8Na4O16S4
Molecular Weight	1152.98 g/mol
Synonyms	Acid Yellow 220 (Tetrasodium Salt); C.I. 27795; Tetrasodium 4,4'-Bis[(3-methyl-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl)azo]-5,5'-dimethyl-[1,1'-biphenyl]-2,2'-disulfonate; Reactive Yellow Dye Intermediate; 4,4'-Bis[[4,5-dihydro-3-methyl-5-oxo-1-(4-sulfonatophenyl)-1H-pyrazol-4-yl]azo]-5,5'-dimethylbiphenyl-2,2'-disulfonic acid tetrasodium salt; Azo Pyrazolone Dye; Direct Yellow 220
EINECS	Contact for details

Quality Control

Our production of Tetrasodium 4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo]-5,5'-Dimethyl[1,1'-Biphenyl]-2,2'-Disulphonate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) detailing all critical parameters are provided with each shipment to guarantee traceability and quality assurance 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 room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
pH (1% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	Contact for details
Solubility (in Water)	Freely soluble

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