Description

3-Sulphobenzoic Acid is a versatile aromatic sulfonic acid derivative that serves as a key intermediate in the synthesis of specialty chemicals. Its value lies in its bifunctional structure, featuring both a carboxylic acid and a sulfonic acid group, enabling its use in creating complex molecules with enhanced solubility or ionic character. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and dye industries seeking to develop advanced formulations and active ingredients.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs requiring sulfonate or carboxylate functionalities for improved bioavailability.
• Agrochemical Synthesis: Serves as a building block for herbicides, fungicides, and plant growth regulators, where the sulfonic acid group can enhance systemic activity.
• Dye and Pigment Manufacturing: Acts as an intermediate for producing acid dyes and pigments, contributing to color fastness and solubility in aqueous systems.
• Polymer Modification: Employed to introduce sulfonate groups into polymers, improving hydrophilicity, dyeability, and antistatic properties.
• Chemical Research & Development: A valuable reagent in organic synthesis for creating sulfonated analogs of benzoic acid derivatives in R&D laboratories.
• Catalyst and Ligand Preparation: Used in the preparation of metal-complexing agents and catalysts for various industrial chemical processes.

Basic Information

Product Name	3-Sulphobenzoic Acid
CAS No.	121-53-9
Molecular Formula	C7H6O5S
Molecular Weight	202.18 g/mol
Synonyms	3-Sulfobenzoic Acid; Benzoic acid, 3-sulfo-; m-Sulfobenzoic Acid; 3-Carboxybenzenesulfonic Acid; meta-Sulphobenzoic Acid; NSC 403754; Benzenesulfonic acid, 3-carboxy-; 3-SBA
EINECS	204-473-6

Quality Control

Our 3-Sulphobenzoic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. A Certificate of Analysis (COA) detailing the results for all critical parameters is provided with every shipment to guarantee traceability and compliance with your quality requirements.

Storage

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

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 (Sulfated Ash)	≤ 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.