Description

3-(Chlorosulfonyl)-4-Hydroxybenzoic Acid is a versatile and reactive aromatic sulfonyl chloride derivative, serving as a critical synthetic intermediate in advanced organic chemistry. Its molecular structure, featuring both a reactive chlorosulfonyl group and a carboxylic acid, makes it a valuable building block for constructing complex molecules with tailored properties. This compound is essential for research and development chemists and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries who require a high-purity precursor for sulfonamide and sulfonate synthesis.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs containing sulfonamide or sulfonate functional groups.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and insecticides where the sulfonyl moiety is integral to biological activity.
• Dyestuff and Pigment Manufacturing: Serves as an intermediate for producing sulfonated azo dyes and other colorants with enhanced solubility and fastness properties.
• Polymer Modification: Employed to introduce sulfonyl chloride groups into polymer chains for subsequent functionalization, creating ion-exchange resins or materials with specific surface properties.
• Chemical Research & Development: A valuable reagent in organic synthesis for constructing complex molecular architectures in academic and industrial R&D settings.
• Liquid Crystal and Electronic Material Precursor: Used in the synthesis of specialized organic compounds for advanced material science applications.

Basic Information

Product Name	3-(Chlorosulfonyl)-4-Hydroxybenzoic Acid
CAS No.	77719-02-9
Molecular Formula	C7H5ClO5S
Molecular Weight	236.63 g/mol
Synonyms	4-Hydroxy-3-sulfonylchloridebenzoic Acid; 4-Hydroxy-3-chlorosulfonylbenzoic Acid; 3-Chlorosulfonyl-4-hydroxybenzoic Acid; Benzoic acid, 4-hydroxy-3-(chlorosulfonyl)-; 3-(Chlorosulphonyl)-4-hydroxybenzoic acid
EINECS	Contact for details

Quality Control

Our 3-(Chlorosulfonyl)-4-Hydroxybenzoic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for use as a high-value intermediate. Certificates of Analysis (COA) documenting purity, assay, and impurity profiles are provided with every shipment to guarantee traceability and batch-to-batch consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under anhydrous conditions to prevent decomposition. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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