Description

Tetrasodium 4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonate is a high-purity, water-soluble anionic dye belonging to the class of pyrazolone-based azo compounds. This compound is valued for its excellent color strength, stability, and compatibility in demanding industrial formulations. It is primarily sought by manufacturers in the textile, paper, and specialty ink industries for its reliable performance as a coloring agent.

Application

• Textile Dyeing: Used for coloring natural and synthetic fibers, particularly where bright, wash-fast shades are required.
• Paper Coloring: Employed in the production of colored paper, paperboard, and specialty packaging materials.
• Ink Manufacturing: A key component in formulating inks for flexographic, gravure, and other printing applications.
• Leather Finishing: Applied in dye baths for leather to achieve consistent and vibrant colors.
• Biological Staining: May be utilized in histological stains and other laboratory reagents due to its specific chromogenic properties.
• Industrial Coatings: Incorporated into coatings and paints where specific color properties are needed.

Basic Information

Product Name	Tetrasodium 4,4'-Bis[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo][1,1'-Biphenyl]-2,2'-Disulphonate
CAS No.	72927-70-9
Molecular Formula	C40H24N8Na4O16S4
Molecular Weight	1088.9 g/mol
Synonyms	Acid Yellow 40; C.I. 18950; Tetrasodium 6,6'-((1,1'-Biphenyl)-4,4'-diylbis(2-((4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl)diazenyl))-3,3'-disulfonate); C.I. Acid Yellow 40; Pyrazolone Yellow; Acid Leather Yellow PGW; Lissamine Yellow 2G; Acid Fast Yellow E
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][1,1'-Biphenyl]-2,2'-Disulphonate adheres to stringent quality protocols to ensure batch-to-batch consistency and performance. Each lot is analyzed for critical parameters including color strength, purity, and impurity profile. Certificates of Analysis (COA) detailing specifications such as assay, heavy metal content, and solubility are available upon request.

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.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 30.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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