Description

2-Chloro-5-Sulfobenzoic Acid is a versatile aromatic sulfonic acid derivative that serves as a critical intermediate in advanced organic synthesis. Its bifunctional nature, featuring both a carboxylic acid and a sulfonic acid group, makes it a valuable building block for creating complex molecules with tailored properties. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and specialty dye industries seeking to develop new active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key starting material for synthesizing active pharmaceutical ingredients (APIs), particularly sulfonamide-based drugs.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators that require a sulfonated aromatic backbone.
• Dye and Pigment Manufacturing: Acts as a precursor for water-soluble azo dyes and pigments, imparting color fastness and solubility.
• Ligand and Chelating Agent: Serves as a building block for creating specialized ligands used in catalysis and metal ion sequestration.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers, enhancing properties like hydrophilicity and ion-exchange capacity.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new chemical entities and reaction pathways.

Basic Information

Product Name	2-Chloro-5-Sulfobenzoic Acid
CAS No.	40284-70-6
Molecular Formula	C7H5ClO5S
Molecular Weight	236.63 g/mol
Synonyms	5-Sulfo-2-chlorobenzoic Acid; Benzoic acid, 2-chloro-5-sulfo-; 2-Chlorosulfobenzoic Acid; 2-Chloro-5-sulfobenzoic acid; 2-Chloro-5-sulphobenzoic acid; 2-Chlorobenzene-1,4-dicarboxylic acid 1-sulfonic acid (tautomeric form); 2-Chloro-5-carboxybenzenesulfonic acid
EINECS	254-849-9

Quality Control

Our 2-Chloro-5-Sulfobenzoic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets the high-purity standards required for sensitive synthesis applications. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and consistency for our B2B partners.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product stability and handling.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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