Description

2-Amino-4-Chlorodiphenylether-4'-Sulfonic Acid CAS NO 6534-29-8 is a specialized aromatic sulfonic acid derivative that serves as a critical high-value intermediate in advanced chemical synthesis. Its unique structure, featuring both amino and sulfonic acid functional groups on a chlorinated diphenyl ether backbone, makes it indispensable for creating complex molecules with specific properties. This compound is primarily sought after by manufacturers in the pharmaceutical and specialty dye industries for the development of active pharmaceutical ingredients (APIs) and high-performance colorants.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel drug candidates, particularly in therapeutic areas requiring complex heterocyclic structures.
• Specialty Dye & Pigment Synthesis: Used in the manufacture of high-value, light-fast azo dyes and pigments for textiles, inks, and coatings.
• Liquid Crystal & OLED Material Precursor: Serves as a starting material for creating advanced organic electronic materials used in displays and lighting.
• Agrochemical Intermediate: Employed in the research and development of new-generation herbicides and fungicides.
• Polymer Modification Agent: Used to introduce sulfonic acid groups into polymers to alter solubility, ionic character, or dye-affinity.
• Research & Development: A valuable reagent in academic and industrial R&D labs for exploring new organic reactions and material science applications.

Basic Information

Item	Details
Product Name	2-Amino-4-Chlorodiphenylether-4'-Sulfonic Acid
CAS No.	6534-29-8
Molecular Formula	C12H10ClNO4S
Molecular Weight	299.73 g/mol
Synonyms	4'-Amino-4-Chlorodiphenyl Ether-2-Sulfonic Acid; 2-Amino-4'-chlorodiphenyl Ether-4-sulfonic Acid; 4-Chloro-2-aminodiphenyl Ether-4'-sulfonic Acid; 5-Amino-2-(4-chlorophenoxy)benzenesulfonic Acid; 2-Amino-4-chlorophenyl 4-sulfophenyl Ether; 4-(4-Chloro-2-aminophenoxy)benzenesulfonic Acid; CLT Acid (common industry abbreviation); Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our production of 2-Amino-4-Chlorodiphenylether-4'-Sulfonic Acid adheres to a stringent quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting customer specifications. Certificates of Analysis (COA) detailing all test results are provided and can be tailored to support regulatory filings for pharmaceutical or agrochemical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled 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 stability and handling properties.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility (Test)	Soluble in alkaline aqueous solutions

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