Description

[1,1'-Biphenyl]-2,2'-Disulfonic Acid, 4-[(1-Hydroxy-4-Sulfo-2-Naphthalenyl) Azo]-5,5'-Dimethyl-4'-[[4-[(Phenylsulfonyl)Oxy]Phenyl]Azo]-, Trisodium Salt is a high-purity, synthetic azo dye intermediate with a complex, multi-functional structure. This compound is engineered to deliver exceptional chromophoric properties and chemical stability, making it a critical precursor for advanced colorants. It is primarily needed by manufacturers in the specialty dyes and pigments, textile processing, and high-performance ink industries seeking to develop products with specific, durable hues.

Application

• Synthesis of High-Performance Dyes and Pigments: As a key intermediate for producing complex azo dyes used in textiles, plastics, and coatings.
• Textile Colorant Manufacturing: For creating specialized dyes with enhanced fastness properties for synthetic and natural fibers.
• Industrial Ink Formulation: Used in the production of inks for packaging, printing, and specialty marking applications.
• Functional Colorant Research: Serves as a building block in R&D for novel colorants with specific optical or electronic properties.
• Liquid Crystal Display (LCD) Color Filters: Potential use in the synthesis of colorants for electronic display technologies.
• Analytical Chemistry Reagents: Can be utilized as a staining agent or chromogenic substrate in specific laboratory tests.

Basic Information

Product Name	[1,1'-Biphenyl]-2,2'-Disulfonic Acid, 4-[(1-Hydroxy-4-Sulfo-2-Naphthalenyl) Azo]-5,5'-Dimethyl-4'-[[4-[(Phenylsulfonyl)Oxy]Phenyl]Azo]-, Trisodium Salt
CAS No.	159317-41-6
Molecular Formula	C41H27N4Na3O14S4
Molecular Weight	~996.88 g/mol
Synonyms	Trisodium 4-[(1-hydroxy-4-sulfo-2-naphthyl)azo]-5,5'-dimethyl-4'-[[4-(phenylsulfonyloxy)phenyl]azo]biphenyl-2,2'-disulfonate; Azo Dye Intermediate 159317-41-6; Biphenyl disulfonic acid azo dye sodium salt; C.I. Direct Yellow 142 (related); Complex Azo Dye Salt; 4,4'-Bis(azo) biphenyl derivative; Sulfonated azo dye precursor; Textile dye intermediate.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical characteristics.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and stability.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (Water)	Freely soluble

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