Description

4,4'-Bis[[2,5-Dimethyl-4-[(4-Sulphophenyl)Azo]Phenyl]-N,N,o-Azoxy]Stilbene-2,2'-Disulphonic Acid, Ammonium Sodium Salt is a high-purity, water-soluble anionic dye intermediate characterized by its complex stilbene and azo-based molecular structure. This compound is valued for its ability to impart bright, stable coloration and is a critical precursor in the synthesis of specialized dyes and pigments. It is primarily sought after by manufacturers in the textile, paper, and specialty chemical industries for producing high-performance colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing direct and reactive dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Paper Coloring: Used in the production of dyes for high-quality paper and paperboard, providing vibrant and uniform shades.
• Functional Dye Synthesis: Serves as a building block for creating dyes used in lasers, optical data storage, and liquid crystal displays (LCDs).
• Ink Manufacturing: An essential component in formulating inks for jet printing and other specialty printing applications.
• Leather Processing: Employed in the dyeing of leather goods to achieve deep, lasting colors.
• Biological Staining: Potential use as a precursor for histological stains in laboratory and diagnostic applications.

Basic Information

Product Name	4,4'-Bis[[2,5-Dimethyl-4-[(4-Sulphophenyl)Azo]Phenyl]-N,N,o-Azoxy]Stilbene-2,2'-Disulphonic Acid, Ammonium Sodium Salt
CAS No.	93904-54-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Direct Yellow 11 (Ammonium Sodium Salt); C.I. 40000; Stilbene Yellow; 4,4'-Bis[(2,5-dimethyl-4-((4-sulfophenyl)azo)phenyl)azo]stilbene-2,2'-disulfonic acid ammonium sodium salt; Ammonium sodium 4,4'-[1,2-ethenediylbis[(2-sulfo-4,1-phenylene)azo]]bis[2,5-dimethylbenzenesulfonate]; Azo Stilbene Dye Intermediate; Bright Yellow Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of 4,4'-Bis[[2,5-Dimethyl-4-[(4-Sulphophenyl)Azo]Phenyl]-N,N,o-Azoxy]Stilbene-2,2'-Disulphonic Acid, Ammonium Sodium Salt adheres to stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical composition. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment 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 each use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (in Water)	Clear Solution
Heavy Metals (as Pb)	≤ 20 ppm

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