Description

Benzoic Acid, 3-Sulfino- is a specialized sulfonated derivative of benzoic acid, serving as a key intermediate in fine chemical synthesis. Its value lies in the reactive sulfino group, which enables its use in the production of dyes, pharmaceuticals, and advanced materials. This compound is essential for R&D chemists and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to introduce sulfonic acid functionality into complex molecules.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring sulfonamide or sulfonic acid ester linkages.
• Dye and Pigment Manufacturing: Used in the production of water-soluble dyes, acid dyes, and reactive dyes due to its polar sulfino group which enhances solubility and fiber affinity.
• Agrochemical Synthesis: Serves as a precursor for certain herbicides, fungicides, and plant growth regulators where the benzoic acid scaffold is functionalized.
• Ligand and Chelating Agent: The sulfino group can act as a coordinating site in metal complexation for catalysts or analytical reagents.
• Chemical Research & Development: Employed in organic synthesis for introducing sulfinic acid derivatives, studying reaction mechanisms, and developing new synthetic methodologies.
• Polymer Modification: Can be used to modify polymer chains to impart hydrophilicity, ionic character, or specific reactivity.

Basic Information

Product Name	Benzoic Acid, 3-Sulfino-
CAS No.	15451-00-0
Molecular Formula	C7H6O4S
Molecular Weight	186.19 g/mol
Synonyms	3-Sulfinobenzoic Acid; 3-Carboxybenzenesulfinic Acid; m-Sulfinobenzoic Acid; Benzoic Acid, m-Sulfino-; 3-Sulfobenzoic Acid (common misnomer); 1-Carboxy-3-sulfinobenzene; m-Carboxybenzenesulfinic Acid
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 3-Sulfino- is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by IR and NMR spectroscopy, to ensure it meets the high standards required for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment and is available upon request.

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 hygroscopic and easily oxidized nature, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation and to minimize moisture uptake.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
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.