Description

Sodium 2-[p-[[4-[(p-Hydroxyphenyl)Azo]-o-Tolyl]Azo]Phenoxy]Ethyl Sulphate is a specialized anionic azo dye intermediate, valued for its ability to impart vibrant and stable coloration in demanding applications. Its chemical structure, featuring dual azo linkages and a hydrophilic sulfate group, offers excellent water solubility and binding properties. This compound is essential for manufacturers in the textile, ink, and specialty polymer industries seeking high-performance colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, providing excellent wash and light fastness.
• Ink Formulation: Used in the production of pigments for inks in packaging, printing, and writing instruments, ensuring bright and consistent color output.
• Polymer Staining: Employed as a colorant masterbatch for plastics and synthetic fibers to achieve uniform and durable coloration.
• Laboratory Reagent: Serves as a chemical standard and intermediate in research and development for novel dye and pigment synthesis.
• Leather Finishing: Utilized in dye formulations for leather goods, offering deep penetration and color stability.
• Paper Coloring: Applied in specialty paper production for decorative and functional colored papers.

Basic Information

Product Name	Sodium 2-[p-[[4-[(p-Hydroxyphenyl)Azo]-o-Tolyl]Azo]Phenoxy]Ethyl Sulphate
CAS No.	21116-11-0
Molecular Formula	C27H23N4NaO6S
Molecular Weight	554.55 g/mol
Synonyms	Sodium 2-{4-[4-(2-Methyl-4-[(4-hydroxyphenyl)azo]phenyl)azo]phenoxy}ethyl sulfate; 2-{4-[4-(2-Methyl-4-[(4-hydroxyphenyl)azo]phenyl)azo]phenoxy}ethyl Sodium Sulfate; Azo Dye Intermediate Yellow 4; Phenoxyethyl Sulfate Azo Dye Salt; CI 12715 (related); Sodium Phenoxyethylsulfate Azo Dye; 4-[(4-Hydroxyphenyl)azo]-2-methyl-4'-[2-(sulfonatooxy)ethoxy]azobenzene
EINECS	Contact for details

Quality Control

Our production of Sodium 2-[p-[[4-[(p-Hydroxyphenyl)Azo]-o-Tolyl]Azo]Phenoxy]Ethyl Sulphate adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for industrial applications. Each lot is analyzed against comprehensive specifications, including identity, assay, and impurity profiles. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

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). Keep away from heat sources and incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Orange to red-brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility	Freely soluble in water
Heavy Metals (as Pb)	≤ 20 ppm

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