Description

Sodium 3-[[5-(Anilinosulphonyl)-4-Methylphenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate is a high-purity azo dye intermediate, valued for its precise chemical structure and consistent performance in demanding synthesis processes. Its primary commercial value lies in its role as a key building block for producing specialized dyes and pigments with specific coloristic and fastness properties. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking reliable intermediates for high-value colorant production.

Application

• Primary Intermediate for Dyes & Pigments: A critical precursor in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring nylon, silk, wool, and paper.
• Textile Industry: Used to manufacture dyes that offer good wash and light fastness on protein and polyamide fibers.
• Ink Manufacturing: Serves as a key component in the production of specialized inks for packaging, security printing, and digital textiles.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and applications.
• Specialty Chemical Synthesis: Acts as a functional intermediate for creating complex molecules used in analytical reagents and light-absorbing materials.

Basic Information

Product Name	Sodium 3-[[5-(Anilinosulphonyl)-4-Methylphenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate
CAS No.	85959-52-0
Molecular Formula	C23H16N3NaO6S2
Molecular Weight	517.50 g/mol
Synonyms	Sodium 3-[[5-(Anilinosulfonyl)-4-methylphenyl]azo]-4-hydroxy-1-naphthalenesulfonate; C.I. Acid Orange 156; Acid Orange 156; 3-[[5-(Anilinosulfonyl)-4-methylphenyl]azo]-4-hydroxy-1-naphthalenesulfonic Acid Sodium Salt; Sodium 4-hydroxy-3-[[4-methyl-5-[(phenylamino)sulfonyl]phenyl]azo]-1-naphthalenesulfonate; Azo Dye Intermediate 85959-52-0; Orange 156 Sodium Salt
EINECS	Contact for details

Quality Control

Our Sodium 3-[[5-(Anilinosulphonyl)-4-Methylphenyl]Azo]-4-Hydroxynaphthalene-1-Sulphonate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chemical structure, and batch-to-batch reproducibility suitable for industrial synthesis. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request to support your quality assurance protocols.

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 moisture absorption and degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
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.