Description

4-Chloroaniline-3-Sulfonic Acid is a key aromatic sulfonic acid derivative and an important organic synthesis intermediate. This compound matters for its role as a versatile building block in the production of high-value dyes, pigments, and specialty chemicals. Industries that require it include manufacturers of azo dyes, pharmaceutical intermediates, and agrochemicals, where its unique substitution pattern enables specific molecular transformations.

Application

• Primary intermediate in the synthesis of azo dyes and pigments, particularly for yellows, oranges, and reds.
• Key starting material for manufacturing pharmaceutical intermediates and active ingredients.
• Building block in the production of agrochemicals, such as herbicides and pesticides.
• Used in research and development for creating specialty chemicals and functional materials.
• Intermediate for corrosion inhibitors and other industrial additives.
• Precursor in the synthesis of liquid crystal compounds and other advanced materials.

Basic Information

Product Name	4-Chloroaniline-3-Sulfonic Acid
CAS No.	88-43-7
Molecular Formula	C6H6ClNO3S
Molecular Weight	207.63 g/mol
Synonyms	3-Sulfo-4-chloroaniline; 4-Chloro-3-aminobenzenesulfonic Acid; 4-Chloro-3-sulfoaniline; 4-Chloro-m-aminobenzenesulfonic Acid; 2-Chloro-5-aminobenzenesulfonic Acid; 5-Amino-2-chlorobenzenesulfonic Acid; C.I. 37040; 4-Chloroaniline-3-sulphonic acid
EINECS	201-831-5

Quality Control

Our 4-Chloroaniline-3-Sulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive 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, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light gray crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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