Description

2-Amino-4-Chloro-5-Methylbenzenesulfonic Acid is a key sulfonated aromatic amine intermediate with significant industrial utility. This compound matters for its role as a versatile building block in the synthesis of complex organic molecules, particularly dyes and pigments. Industries that require it include specialty chemical manufacturing, particularly for producing azo dyes, optical brighteners, and other functional colorants.

Application

• Primary intermediate in the synthesis of azo dyes and pigments for textiles, inks, and plastics.
• Building block for manufacturing optical brightening agents (OBAs) used in paper and detergent formulations.
• Precursor in the production of specialty chemicals for the agrochemical and pharmaceutical sectors.
• Used in research and development for creating novel sulfonated compounds with specific functional properties.
• Intermediate for liquid crystal and other advanced material applications.

Basic Information

Product Name	2-Amino-4-Chloro-5-Methylbenzenesulfonic Acid
CAS No.	88-51-7
Molecular Formula	C7H8ClNO3S
Molecular Weight	221.66 g/mol
Synonyms	4-Chloro-5-methyl-2-aminobenzenesulfonic Acid; 2-Amino-4-chloro-5-methylbenzenesulfonate; 4-Chloro-5-methylaniline-2-sulfonic Acid; 5-Amino-2-chlorotoluene-4-sulfonic Acid; CLT Acid; 2-Amino-4-chlorotoluene-5-sulfonic Acid; 88-51-7; Benzenesulfonic acid, 2-amino-4-chloro-5-methyl-
EINECS	201-837-7

Quality Control

Our 2-Amino-4-Chloro-5-Methylbenzenesulfonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) documenting these results 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). This product is hygroscopic (moisture-sensitive); ensure the container is kept sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Off-white to light gray powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
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.