Description

2-Amino-4-Hydroxybenzenesulfonic Acid is a key sulfonated aniline derivative, serving as a vital intermediate in the synthesis of complex organic molecules. Its bifunctional nature, featuring both amino and sulfonic acid groups, makes it an essential building block for creating high-value compounds with specific functional properties. This product is primarily sought after by manufacturers in the pharmaceutical, dye, and specialty chemical industries for research and production purposes.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring sulfonamide or azo linkages.
• Dye and Pigment Manufacturing: Used in the production of acid dyes, reactive dyes, and azo pigments, contributing to color fastness and molecular stability.
• Chemical Research & Development: Serves as a versatile building block in organic synthesis for creating novel sulfonated compounds and fine chemicals.
• Photographic Chemical: Can be utilized in the formulation of certain developers and other specialty chemicals for photographic applications.
• Corrosion Inhibitor Synthesis: Acts as an intermediate for manufacturing specialty chemicals used in water treatment and metal surface protection.
• Liquid Crystal & Electronic Material Precursor: Employed in the synthesis of advanced materials for electronic displays and functional polymers.

Basic Information

Product Name	2-Amino-4-Hydroxybenzenesulfonic Acid
CAS No.	5857-93-2
Molecular Formula	C6H7NO4S
Molecular Weight	189.19 g/mol
Synonyms	4-Amino-2-hydroxybenzenesulfonic acid; 2-Hydroxy-4-aminobenzenesulfonic acid; 4-Amino-2-phenol sulfonic acid; 2-Amino-4-phenolsulfonic acid; 1-Amino-2-hydroxy-5-sulfobenzene; 4-Amino-2-hydroxybenzenesulfonate; 2-Hydroxy-p-phenylenediamine-4-sulfonic acid
EINECS	227-476-4

Quality Control

Our 2-Amino-4-Hydroxybenzenesulfonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for industrial and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials such as strong acids and organic solvents. Recommended storage temperature is between 15°C and 25°C. Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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