Description

Sodium 7-(4-Aminoanilino)-4-Hydroxynaphthalene-2-Sulphonate is a specialized aromatic sulfonate salt, a key intermediate in the synthesis of high-performance dyes and pigments. Its molecular structure, featuring both amino and hydroxyl functional groups, provides excellent coupling properties and chromophore development. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vivid, stable azo dyes and functional colorants.

Application

• Primary intermediate for the synthesis of azo dyes and pigments used in textile coloring.
• Key precursor in manufacturing reactive dyes for cotton and other cellulose fibers.
• Used in the production of specialty inks, including for packaging and security printing applications.
• Intermediate for functional dyes used in optical media and laser printing.
• Research and development of novel colorimetric sensors and pH indicators.
• Starting material for photographic chemicals and light-sensitive materials.

Basic Information

Product Name	Sodium 7-(4-Aminoanilino)-4-Hydroxynaphthalene-2-Sulphonate
CAS No.	28907-86-0
Molecular Formula	C₁₆H₁₃N₂NaO₄S
Molecular Weight	352.34 g/mol
Synonyms	7-(4-Aminoanilino)-4-hydroxy-2-naphthalenesulfonic acid sodium salt; Sodium 4-hydroxy-7-[(4-aminophenyl)amino]-2-naphthalenesulfonate; C.I. Azoic Coupling Component 18; Naphthol AS-G; Azoic Coupling Component 18; 7-Amino-4-hydroxy-2-naphthalenesulfonic acid, N-phenyl- derivative, sodium salt; Benzenesulfonic acid, 4-amino-, coupled with sodium 4-hydroxy-7-(phenylamino)-2-naphthalenesulfonate (1:1)
EINECS	Contact for details

Quality Control

Our Sodium 7-(4-Aminoanilino)-4-Hydroxynaphthalene-2-Sulphonate is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance as a dye intermediate. Certificates of Analysis (COA) documenting identity, assay, 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, well-ventilated area at a controlled 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. For long-term storage, consider using a desiccant. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Light brown 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
Related Substances (HPLC)	Total impurities ≤ 3.0%

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