Description

4-Chloro-2-Mercaptobenzoic Acid is a versatile sulfur-containing benzoic acid derivative that serves as a critical building block in advanced organic synthesis. Its unique structure, featuring both a carboxylic acid and a thiol group, makes it a valuable intermediate for constructing complex molecules with tailored properties. This compound is primarily sought after by research institutions and manufacturers in the pharmaceutical and agrochemical sectors for developing active ingredients and novel chemical entities.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring a thiol or disulfide linkage.
• Agrochemical Synthesis: Used in the development of herbicides, fungicides, and plant growth regulators, leveraging its reactive sites for structural modification.
• Ligand and Catalyst Preparation: Serves as a chelating agent or precursor for metal-organic complexes and catalysts in specialty chemical manufacturing.
• Polymer Modification: Acts as a chain transfer agent or functional monomer to introduce thiol groups into polymers, altering their cross-linking and adhesive properties.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new synthetic pathways and creating compound libraries for screening.
• Dye and Pigment Intermediate: Utilized in the synthesis of specialized colorants and functional dyes due to its aromatic core and substitutable groups.

Basic Information

Product Name	4-Chloro-2-Mercaptobenzoic Acid
CAS No.	20324-49-6
Molecular Formula	C7H5ClO2S
Molecular Weight	188.63 g/mol
Synonyms	2-Mercapto-4-chlorobenzoic Acid; 4-Chloro-2-sulfanylbenzoic Acid; Benzoic acid, 4-chloro-2-mercapto-; 4-Chlorothiosalicylic Acid; 2-Thiol-4-chlorobenzoic Acid; 4-Chloro-2-thiobenzoic Acid; 4-Chloro-2-mercaptobenzoic acid (ACI)
EINECS	243-759-6

Quality Control

Our 4-Chloro-2-Mercaptobenzoic Acid is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets the high standards required for synthetic applications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting all critical quality parameters.

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 sensitivity to oxidation, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	185 - 190 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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