Description

7-Amino-4-Hydroxy-8-[(3-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for producing a range of vivid and stable azo dyes and pigments, particularly those in the red to violet spectrum. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and reliable supply chains for their colorant production.

Application

• Primary Intermediate for Azo Dyes: Serves as the core building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring nylon, silk, wool, and paper.
• Textile Industry: Used in the manufacturing of dyes for textile fibers, providing colors with good wash and light fastness properties.
• Inkjet and Printing Inks: A crucial component in the production of high-performance pigments for inks, ensuring color intensity and stability.
• Leather Dyeing: Employed in the formulation of dyes for leather finishing, offering deep, penetrating coloration.
• Biological Staining: Potential use as an intermediate for certain biological stains and indicators in laboratory settings.
• Research & Development: Used by chemical R&D teams for developing novel colorants and studying azo coupling reactions.

Basic Information

Item	Details
Product Name	7-Amino-4-Hydroxy-8-[(3-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid
CAS No.	67906-61-0
Molecular Formula	C16H12N4O7S2
Molecular Weight	436.42 g/mol
Synonyms	Acid Red 299 (related dye precursor); 8-[(3-Sulfophenyl)azo]-7-amino-4-hydroxy-2-naphthalenesulfonic acid; 7-Amino-4-hydroxy-2-naphthalenesulfonic acid-8-azo-3'-benzenesulfonic acid; Azoic Diazo Component 44 (variant); C.I. 18130; 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-8-[(3-sulfophenyl)azo]-; 3-[(7-Amino-4-hydroxy-2-sulfo-1-naphthyl)azo]benzenesulfonic acid
EINECS	Contact for details

Quality Control

Our production of 7-Amino-4-Hydroxy-8-[(3-Sulphophenyl)Azo]Naphthalene-2-Sulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry specifications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with each shipment to guarantee traceability and consistency for your manufacturing processes.

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 incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark red to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Typical 97-99%)
Water Content	≤ 5.0%
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water and alkaline solutions

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