Description

Benzoic Acid, 4-Chloro-3-Sulfo- is a versatile aromatic sulfonic acid derivative, serving as a critical intermediate in advanced organic synthesis. Its value lies in the unique combination of a carboxylic acid group, a sulfonic acid group, and a chloro substituent, which allows for precise functionalization and modification. This compound is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty dye industries who require a high-purity building block for creating complex molecules.

Application

• Pharmaceutical Intermediate: Key building block for synthesizing active pharmaceutical ingredients (APIs), particularly those requiring sulfonamide or benzoic acid derivatives.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators where the chlorosulfonyl group enables specific biological activity.
• Dye and Pigment Manufacturing: Acts as a precursor for sulfonated azo dyes and other colorants, providing water solubility and color fastness.
• Ligand and Catalyst Development: Employed in coordination chemistry to create chelating agents and metal-organic frameworks (MOFs).
• Polymer Modification: Used to introduce sulfonic acid groups into polymers for ion-exchange resins or to enhance hydrophilicity.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new synthetic pathways and material properties.

Basic Information

Item	Detail
Product Name	Benzoic Acid, 4-Chloro-3-Sulfo-
CAS No.	755698-62-5
Molecular Formula	C7H5ClO5S
Molecular Weight	236.63 g/mol
Synonyms	4-Chloro-3-sulfobenzoic acid; 3-Sulfo-4-chlorobenzoic acid; 4-Chlorobenzene-1,2-dicarboxylic acid 1-sulfonic acid (tautomer); Benzoic acid, 4-chloro-3-sulfo-; 4-Chloro-3-carboxybenzenesulfonic acid; 2-Carboxy-5-chlorobenzenesulfonic acid; 5-Chloro-2-sulfobenzoic acid
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 4-Chloro-3-Sulfo- is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with every shipment, documenting key parameters such as assay, impurity profile, and physical characteristics. Our quality commitment ensures the material meets the stringent requirements for use in regulated synthesis applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and should be kept in a dry environment. Keep away from strong bases and 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	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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