Description

Benzene-1,4-Disulfonic Acid CAS NO 31375-02-7 is a versatile and important organic intermediate characterized by its two sulfonic acid groups on a benzene ring. This structure makes it a valuable building block for the synthesis of dyes, optical brighteners, and specialty chemicals. It is essential for manufacturers and R&D laboratories in the fine chemical, agrochemical, and pharmaceutical sectors seeking to introduce sulfonate functionality into their products.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of acid dyes, direct dyes, and reactive dyes, providing water solubility and fiber affinity.
• Optical Brightener Production: Used in the manufacture of stilbene-based optical brightening agents (OBAs) for paper, textiles, and detergents.
• Pharmaceutical Synthesis: Serves as a sulfonating agent and building block for active pharmaceutical ingredients (APIs) and drug candidates.
• Agrochemical Formulations: Employed in the synthesis of herbicides, fungicides, and other crop protection agents.
• Catalyst and Ligand Preparation: Useful for creating sulfonated ligands and organocatalysts used in various chemical reactions.
• Ion Exchange Resins: Acts as a monomer or functionalization agent in the production of specialty ion exchange materials.
• Research & Development: A valuable reagent for academic and industrial research in organic synthesis and material science.

Basic Information

Product Name	Benzene-1,4-Disulfonic Acid
CAS No.	31375-02-7
Molecular Formula	C6H6O6S2
Molecular Weight	238.23 g/mol
Synonyms	1,4-Benzenedisulfonic Acid; p-Benzenedisulfonic Acid; Benzene-p-disulfonic Acid; 4-Sulfobenzenesulfonic Acid; NSC 403697; Terephthalic Acid Disulfonic Acid Derivative; p-Phenylenedisulfonic Acid
EINECS	Contact for details

Quality Control

Our Benzene-1,4-Disulfonic Acid is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance. We provide comprehensive Certificates of Analysis (COA) with key parameters including assay, identity confirmation, and impurity profiles. Our quality commitment aligns with cGMP principles where applicable, ensuring reliability for your critical synthesis 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). This product is hygroscopic (moisture-sensitive) and a strong acid; ensure containers are kept tightly sealed to prevent moisture absorption and are stored separately from bases and reactive materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 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.