Description

(4-Aminophenyl)Methanesulfonic Acid is a specialized aromatic sulfonic acid derivative featuring both an amino and a sulfonic acid functional group. This unique bifunctional structure makes it a valuable intermediate for the synthesis of dyes, pigments, and pharmaceutical compounds. It is primarily sought by manufacturers in the fine chemical, pharmaceutical, and agrochemical industries for creating advanced materials and active ingredients.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring sulfonamide or aniline linkages.
• Dye & Pigment Manufacturing: Serves as a crucial intermediate for producing azo dyes and other colorants, where the amino group enables diazotization and coupling reactions.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents that incorporate sulfonic acid moieties for enhanced activity or solubility.
• Chemical Research & Development: Employed as a reagent in organic synthesis for introducing sulfonic acid groups into aromatic systems under controlled conditions.
• Polymer Modification: Acts as a monomer or functionalizing agent for creating specialty polymers with ionic or hydrophilic properties.
• Corrosion Inhibitor Formulation: Utilized in the development of advanced corrosion inhibitors for industrial water treatment and metalworking fluids.

Basic Information

Product Name	(4-Aminophenyl)Methanesulfonic Acid
CAS No.	6387-28-6
Molecular Formula	C7H9NO3S
Molecular Weight	187.22 g/mol
Synonyms	4-Aminobenzenemethanesulfonic Acid; p-Aminophenylmethanesulfonic Acid; 4-Aminobenzylsulfonic Acid; (p-Aminophenyl)methanesulfonic Acid; Benzenemethanesulfonic acid, 4-amino-; 4-Aminobenzyl Sulfonic Acid; 4-AMBS; 6387-28-6
EINECS	228-970-9

Quality Control

Our (4-Aminophenyl)Methanesulfonic Acid is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing to ensure it meets the required chemical purity and physical specifications. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are provided with every shipment. We can supply material compliant with various customer-specific standards upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
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.