Description

4-Amino Benzene Sulfinic Acid is a versatile organic intermediate with significant industrial utility. This compound, also known as Metanilic Acid, is valued for its role as a key building block in the synthesis of dyes, pigments, and other specialty chemicals. It is primarily sought after by manufacturers in the dyestuff, pharmaceutical, and agrochemical industries for its reactive amino and sulfinic acid functional groups.

Application

• Dye and Pigment Manufacturing: A crucial intermediate for producing azo dyes, acid dyes, and reactive dyes.
• Pharmaceutical Synthesis: Used as a building block in the creation of various active pharmaceutical ingredients (APIs) and sulfa drugs.
• Agrochemical Production: Serves as a precursor in the synthesis of certain herbicides, pesticides, and plant growth regulators.
• Chemical Research & Development: Employed in organic synthesis and as a reagent for introducing the sulfinic acid moiety.
• Photographic Chemicals: Can be used in the formulation of certain photographic developers and sensitizers.
• Corrosion Inhibitors: Acts as a component in formulations designed to protect metals from corrosion.

Basic Information

Product Name	4-Amino Benzene Sulfinic Acid
CAS No.	7472-15-3
Molecular Formula	C6H7NO2S
Molecular Weight	157.19 g/mol
Synonyms	Metanilic Acid; 3-Aminobenzenesulfinic Acid; m-Aminobenzenesulfinic Acid; Aniline-3-sulfinic Acid; 3-Sulfoaniline; Benzenesulfinic acid, 3-amino-; m-Sulfanilic Acid
EINECS	231-263-9

Quality Control

Our 4-Amino Benzene Sulfinic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent performance for industrial 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 at room temperature (15-25°C). This material is easily oxidized and should be kept under an inert atmosphere for long-term storage to maintain stability and purity. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 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.