Description

7-Amino-3-Hydroxynaphthalene-1-Sulphonic Acid is a high-purity naphthalene derivative sulfonic acid, serving as a critical intermediate in the synthesis of complex organic molecules. Its value lies in its bifunctional amino and hydroxyl groups, which make it an essential building block for creating dyes, pigments, and specialty chemicals. This compound is primarily needed by manufacturers in the dye and pigment industry, as well as by research institutions and pharmaceutical companies developing novel compounds.

Application

• Primary intermediate in the synthesis of azo dyes and pigments for textiles, inks, and plastics.
• Key precursor for manufacturing fluorescent whitening agents (optical brighteners).
• Building block in organic synthesis for pharmaceutical research and active pharmaceutical ingredient (API) development.
• Used in the production of specialty chemicals and complexing agents.
• Intermediate for analytical reagents and biochemical research applications.
• Potential use in the synthesis of corrosion inhibitors and polymer additives.

Basic Information

Product Name	7-Amino-3-Hydroxynaphthalene-1-Sulphonic Acid
CAS No.	86-61-3
Molecular Formula	C₁₀H₉NO₄S
Molecular Weight	239.25 g/mol
Synonyms	7-Amino-3-naphthol-1-sulfonic acid; 3-Hydroxy-7-aminonaphthalene-1-sulfonic acid; 7-Amino-3-hydroxy-1-naphthalenesulfonic acid; 1-Naphthalenesulfonic acid, 7-amino-3-hydroxy-; 2-Amino-8-hydroxy-6-naphthalenesulfonic acid; 8-Amino-6-hydroxy-2-naphthalenesulfonic acid; K acid; K-Acid
EINECS	201-685-7

Quality Control

Our 7-Amino-3-Hydroxynaphthalene-1-Sulphonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry standards. Certificates of Analysis (COA) detailing all specifications 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 place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light gray powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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