Description

Disodium 4-[(2,4-Diaminophenyl)Azo]-4'-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo][1,1'-Biphenyl]-2,2'-Disulphonate is a high-purity, water-soluble disazo dye intermediate with a complex molecular structure designed for specialized coloration applications. Its core value lies in its ability to impart specific, vibrant hues and its compatibility with various industrial processes requiring stable, anionic dye components. This product is essential for manufacturers in the textile, leather, and specialty ink industries who require precise and reliable colorants for high-performance materials.

Application

• Textile Dyeing: Primary application for dyeing natural and synthetic fibers, particularly where bright, wash-fast colors are required.
• Leather Finishing: Used in the coloration of leather goods, providing deep, uniform shades with good adhesion.
• Paper Coloring: Employed in the production of colored papers and paperboard for packaging and decorative purposes.
• Specialty Inks: A key component in formulating inks for jet printing, security printing, and other high-performance ink systems.
• Biological Staining: Potential use as a histological stain in laboratory settings due to its specific chromogenic properties.
• Polymer Coloring: For mass coloration of plastics and polymers where thermal stability is a factor.

Basic Information

Product Name	Disodium 4-[(2,4-Diaminophenyl)Azo]-4'-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo][1,1'-Biphenyl]-2,2'-Disulphonate
CAS No.	84176-81-8
Molecular Formula	C34H24N8Na2O8S2
Molecular Weight	774.71 g/mol
Synonyms	Direct Brown 2; C.I. 22311; Benzenesulfonic acid, 4,4'-[(2,4-diaminophenyl)azo][1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazole-, disodium salt; 4,4'-[(2,4-Diaminophenyl)azo][1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazole-4-sulfonic acid], disodium salt; Disodium 4,4'-[(2,4-diaminophenyl)azo][1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazole-4-sulfonate); C.I. Direct Brown 2
EINECS	Contact for details

Quality Control

Our production of Disodium 4-[(2,4-Diaminophenyl)Azo]-4'-[(4,5-Dihydro-3-Methyl-5-Oxo-1-Phenyl-1H-Pyrazol-4-Yl)Azo][1,1'-Biphenyl]-2,2'-Disulphonate adheres to stringent quality management systems to ensure batch-to-batch consistency and reliability. The product undergoes rigorous analytical testing, including HPLC for purity and spectrophotometry for color strength verification. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Color Strength	98 - 102% (vs. Standard)
Moisture (KF)	≤ 5.0%
Water Solubility	Freely soluble
Ash Content	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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