Description

3-Amino-4-Chlorobenzenesulfonic Acid is a key aromatic sulfonic acid derivative and a versatile chemical intermediate prized for its reactive amino and sulfonic acid functional groups. This compound is essential for the synthesis of a wide range of high-value products, including dyes, pigments, and pharmaceutical active ingredients. Industrial manufacturers and R&D laboratories in the agrochemical, dye, and pharmaceutical sectors rely on this high-purity intermediate to ensure consistent and efficient downstream synthesis.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of azo dyes, acid dyes, and reactive dyes, providing color fastness and specific hue properties.
• Pharmaceutical Synthesis: Serves as a key precursor in the manufacture of various active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Production: Used in the synthesis of herbicides, pesticides, and other crop protection chemicals.
• Chemical Research & Development: Employed as a versatile reagent for organic synthesis and the development of new chemical entities.
• Photographic Chemicals: Can be utilized in the production of certain photographic developers and sensitizers.
• Corrosion Inhibitor Formulation: Acts as a component in specialty chemical formulations designed to prevent metal corrosion.

Basic Information

Product Name	3-Amino-4-Chlorobenzenesulfonic Acid
CAS No.	98-36-2
Molecular Formula	C6H6ClNO3S
Molecular Weight	207.64 g/mol
Synonyms	4-Chloro-3-aminobenzenesulfonic Acid; 2-Chloro-5-aminobenzenesulfonic Acid; 5-Amino-2-chlorobenzenesulfonic Acid; 3-Amino-4-chlorobenzene-1-sulfonic acid; 1-Amino-2-chloro-5-sulfobenzene; CLT Acid; C-Acid
EINECS	202-659-1

Quality Control

Our 3-Amino-4-Chlorobenzenesulfonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for industrial and research use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to guarantee traceability and compliance.

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.

Specification

Item	Specification
Appearance	Off-white to light gray crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition (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.