Description

2,5-Diaminobenzenesulfonic Acid is a versatile aromatic sulfonic acid derivative containing two amine functional groups. This compound serves as a critical intermediate in the synthesis of dyes, pigments, and specialty chemicals, valued for its ability to introduce both sulfonic acid and amine functionalities into target molecules. It is essential for manufacturers in the dye and pigment, pharmaceutical, and agrochemical industries seeking to produce water-soluble azo dyes, hair colorants, and functional chemical building blocks.

Application

• Azo Dye Synthesis: A key coupling component for producing a wide range of water-soluble direct, acid, and reactive azo dyes for textiles, leather, and paper.
• Hair Dye Intermediates: Used in the manufacture of oxidative hair dye precursors, contributing to color formation and stability.
• Pharmaceutical Intermediates: Acts as a building block for synthesizing sulfonamide-based active pharmaceutical ingredients (APIs) and other specialty drugs.
• Agrochemical Synthesis: Employed in the production of certain herbicides, fungicides, and plant growth regulators.
• Corrosion Inhibitors: Utilized in formulations for metal surface treatment and cooling water systems.
• Chemical Research & Development: Serves as a versatile reagent in organic synthesis for introducing sulfonic acid groups.

Basic Information

Product Name	2,5-Diaminobenzenesulfonic Acid
CAS No.	88-45-9
Molecular Formula	C6H8N2O3S
Molecular Weight	188.20 g/mol
Synonyms	1,4-Diaminobenzene-2-sulfonic Acid; 2,5-Diaminobenzenesulphonic Acid; 2-Amino-5-aminobenzenesulfonic Acid; 4-Sulfo-m-phenylenediamine; m-Phenylenediamine-4-sulfonic Acid; C.I. 76535; 2,5-DABS Acid
EINECS	201-832-8

Quality Control

Our 2,5-Diaminobenzenesulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Light gray to brown crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated 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.