Description

3,4-Diaminobenzenesulfonic Acid is a key aromatic sulfonic acid derivative featuring two amine functional groups, making it a versatile intermediate for advanced synthesis. This compound is valued for its ability to introduce both sulfonic acid and amine moieties into target molecules, enabling the creation of dyes, pigments, and functional materials with specific properties. It is primarily sought by manufacturers in the dyestuff, pharmaceutical, and agrochemical industries for the production of high-performance azo dyes and as a building block for active pharmaceutical ingredients (APIs).

Application

• Dye and Pigment Intermediate: A crucial precursor for the synthesis of azo dyes and pigments, particularly for textiles, leather, and inks, where it provides color fastness and specific hue characteristics.
• Pharmaceutical Synthesis: Serves as a key building block in the manufacture of various active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Production: Used in the synthesis of certain herbicides, fungicides, and other crop protection agents.
• Chemical Research & Development: Employed as a reagent in organic synthesis and material science research for creating novel sulfonated polymers and complexes.
• Corrosion Inhibitor Formulation: Can be utilized in the development of specialty chemicals for metal surface treatment and corrosion prevention.
• Photographic Chemicals: Finds application in the production of certain photographic developers and sensitizers.

Basic Information

Product Name	3,4-Diaminobenzenesulfonic Acid
CAS No.	7474-78-4
Molecular Formula	C6H8N2O3S
Molecular Weight	188.20 g/mol
Synonyms	1,2-Diamino-4-sulfobenzene; 4-Sulfobenzene-1,2-diamine; 3,4-Diaminophenylsulfonic Acid; 2,3-Diaminobenzenesulfonic Acid; Benzenesulfonic acid, 3,4-diamino-; 4-Amino-3-aminobenzenesulfonic Acid; C.I. 37240; 3,4-Diaminobenzenesulphonic Acid
EINECS	Contact for details

Quality Control

Our 3,4-Diaminobenzenesulfonic Acid is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets high-purity standards and consistent performance for industrial applications. Certificates of Analysis (COA) documenting purity, identity, and impurity profiles are available upon request to support your quality assurance and regulatory needs.

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.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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