Description

3,5-Disulphobenzoic Acid is a versatile aromatic sulfonic acid derivative, primarily valued as a key intermediate in the synthesis of specialty chemicals. Its disulfonated structure makes it particularly useful for introducing water-solubilizing and metal-chelating properties into larger molecules. This compound is essential for manufacturers in the dye, pigment, and pharmaceutical industries, where it serves as a building block for creating advanced functional materials and active pharmaceutical ingredients (APIs).

Application

• Dye and Pigment Intermediate: A crucial precursor for synthesizing water-soluble acid dyes, reactive dyes, and optical brighteners.
• Pharmaceutical Synthesis: Used as a building block in the production of certain sulfonamide-based drugs and other active pharmaceutical ingredients (APIs).
• Complexing Agent: Functions as a ligand or intermediate in the preparation of metal-complexing agents and catalysts.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers, enhancing their hydrophilicity and ion-exchange properties.
• Chemical Research: Serves as a valuable reagent in organic synthesis and chemical research for creating novel sulfonated compounds.
• Surfactant Intermediate: Can be used in the synthesis of specialized anionic surfactants with specific performance characteristics.

Basic Information

Product Name	3,5-Disulphobenzoic Acid
CAS No.	121-48-2
Molecular Formula	C7H6O8S2
Molecular Weight	282.25 g/mol
Synonyms	3,5-Disulfobenzoic Acid; Benzoic Acid, 3,5-Disulfo-; 3,5-Bis(sulfo)benzoic Acid; 3,5-Dicarboxybenzenesulfonic Acid; 5-Carboxy-1,3-benzenedisulfonic Acid; Benzenesulfonic acid, 5-carboxy-1,3-di-; 3,5-Disulpho Benzoic Acid; 3,5-Disulfonylbenzoic Acid
EINECS	204-468-3

Quality Control

Our 3,5-Disulphobenzoic Acid is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with every shipment, detailing all critical quality attributes. Our commitment to consistent quality and reliable supply is fundamental to supporting your production and R&D processes.

Storage

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

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfate Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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