Description

4-Amino-3-Mercaptobenzoic Acid is a multifunctional aromatic compound featuring both amino and thiol groups on a benzoic acid backbone, making it a valuable intermediate for advanced synthesis. Its unique structure enables its use in the production of pharmaceuticals, agrochemicals, and specialty dyes, where it serves as a key building block for creating complex molecules. This high-purity intermediate is essential for research and development laboratories and industrial-scale manufacturers requiring reliable, consistent quality for critical synthesis pathways.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs targeting specific metabolic pathways.
• Agrochemical Synthesis: Used in the manufacture of herbicides, fungicides, and plant growth regulators, leveraging its reactive thiol and amino groups.
• Dye and Pigment Manufacturing: Serves as a building block for producing azo dyes and other complex colorants due to its aromatic amine structure.
• Chemical Research & Development: Employed as a versatile reagent in organic synthesis for constructing heterocyclic compounds and complex molecular architectures.
• Polymer Modification: Acts as a functional monomer or cross-linking agent to introduce specific chemical properties into polymer chains.
• Chelating Agent Precursor: Used in the synthesis of ligands for metal chelation in catalytic and analytical applications.

Basic Information

Product Name	4-Amino-3-Mercaptobenzoic Acid
CAS No.	14543-45-4
Molecular Formula	C7H7NO2S
Molecular Weight	169.20 g/mol
Synonyms	3-Mercapto-4-aminobenzoic Acid; 4-Amino-3-sulfanylbenzoic Acid; 2-Amino-5-carboxybenzenethiol; Benzoic acid, 4-amino-3-mercapto-; 4-Amino-3-thiolbenzoic Acid
EINECS	Contact for details

Quality Control

Our 4-Amino-3-Mercaptobenzoic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for use in sensitive applications like pharmaceutical synthesis. A Certificate of Analysis (COA) detailing all test results 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, well-ventilated place at a controlled room temperature (15-25°C). Due to its properties of being light-sensitive and easily oxidized, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation and to minimize degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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