Description

3,5-Diamino-4-Chlorobenzenesulphonic Acid is a key aromatic sulfonic acid derivative that serves as a critical intermediate in the synthesis of advanced colorants and functional chemicals. Its unique structure, featuring both amino and sulfonic acid groups on a chlorinated benzene ring, provides excellent water solubility and reactivity for coupling reactions. This compound is essential for manufacturers in the dye and pigment industry, as well as for research and development in pharmaceutical and agrochemical synthesis.

Application

• Primary Intermediate for Azo Dyes and Pigments: A crucial coupling component for producing high-performance, water-soluble azo dyes, including acid dyes and reactive dyes for textiles like wool, silk, and nylon.
• Functional Chemical Synthesis: Used in the manufacture of optical brighteners, fluorescent whitening agents, and other specialty chemicals requiring a sulfonated aromatic backbone.
• Pharmaceutical Intermediate: Serves as a building block in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Synthesis: Employed in the research and development of herbicides, pesticides, and other crop protection agents.
• Research & Development: A valuable reagent in organic synthesis laboratories for creating novel sulfonated compounds and studying reaction mechanisms.
• Corrosion Inhibitor Formulations: Can be utilized in the development of water treatment chemicals and metal surface treatment formulations.

Basic Information

Item	Details
Product Name	3,5-Diamino-4-Chlorobenzenesulphonic Acid
CAS No.	7057-68-3
Molecular Formula	C6H7ClN2O3S
Molecular Weight	222.65 g/mol
Synonyms	4-Chloro-3,5-diaminobenzenesulfonic Acid; 2-Chloro-5-aminobenzene-1,3-disulfonic Acid (common misnomer); 3,5-Diamino-4-chlorophenylsulfonic Acid; 4-Chloro-1,3-diaminobenzene-6-sulfonic Acid; 3-Amino-5-chloro-4-aminobenzenesulfonic Acid; C.I. 37040; Diazol Component 2G; Light Fast Scarlet G Base
EINECS	230-357-4

Quality Control

Our 3,5-Diamino-4-Chlorobenzenesulphonic Acid is produced under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and physical characteristics. Our quality commitment ensures 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light gray crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%
Solubility (1% in Water)	Clear to slightly hazy solution

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