Description

Disodium 4-Hydroxy-3-[[4'-[(4-Hydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate of significant industrial importance. This compound is valued for its role in producing vivid and stable colorants, particularly in applications requiring specific hue and fastness properties. It is primarily sought by manufacturers in the textile, ink, and specialty pigment industries for the synthesis of advanced dyes and colorants.

Application

• Textile Dyeing: A key intermediate for the synthesis of reactive, direct, and acid dyes used for coloring cotton, wool, silk, and nylon fibers.
• Ink Manufacturing: Used in the production of high-performance pigments for printing inks, including those for packaging and security applications.
• Specialty Pigments: Serves as a precursor for creating organic pigments with enhanced lightfastness and thermal stability for plastics and coatings.
• Research & Development: Employed in chemical research for developing novel chromophores and studying azo dye chemistry and properties.
• Paper Coloring: Can be utilized in the manufacture of dyes for specialty paper products requiring specific color qualities.
• Biological Staining: Potential use as an intermediate for synthesizing stains used in histological and microbiological applications.

Basic Information

Item	Details
Product Name	Disodium 4-Hydroxy-3-[[4'-[(4-Hydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonate
CAS No.	68109-58-0
Molecular Formula	C36H26N4Na2O8S2
Molecular Weight	744.70 g/mol
Synonyms	Direct Brown 1:2; C.I. 30045; Direct Brown 1:2 (C.I. 30045); 4-Hydroxy-3-((4'-((4-hydroxyphenyl)azo)-3,3'-dimethyl(1,1'-biphenyl)-4-yl)azo)naphthalene-2,7-disulfonic acid disodium salt; Direct Brown 1:2 Metal Free; Direct Brown 1:2 (metal free); Direct Brown 1:2 (C.I. 30045) (metal free); Direct Brown 1:2 (azo dye intermediate)
EINECS	Contact for details

Quality Control

Our Disodium 4-Hydroxy-3-[[4'-[(4-Hydroxyphenyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]Naphthalene-2,7-Disulphonate is produced under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) detailing key specifications are provided to guarantee compliance with your technical requirements.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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