Description

Phenylmethanesulfonic Acid is a versatile organosulfonic acid derivative, valued for its strong acidity and utility as a building block in organic synthesis. Its primary commercial significance lies in its role as a key intermediate for the production of pharmaceuticals, agrochemicals, and specialty chemicals. This compound is particularly relevant for manufacturers in the fine chemical, pharmaceutical, and research sectors seeking a reliable sulfonation reagent or precursor.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents.
• Chemical Research & Development: Employed as a strong acid catalyst or reagent in various organic transformations and laboratory-scale syntheses.
• Dye & Pigment Manufacturing: Serves as an intermediate in the synthesis of certain sulfonated dyes and colorants.
• Polymer Modification: Can be used to introduce sulfonic acid groups into polymer chains to alter properties like hydrophilicity.
• Electroplating Additives: Potential use in specialty plating bath formulations.

Basic Information

Item	Detail
Product Name	Phenylmethanesulfonic Acid
CAS No.	57267-76-2
Molecular Formula	C7H8O3S
Molecular Weight	172.20 g/mol
Synonyms	Benzylsulfonic Acid; α-Toluenesulfonic Acid; (Phenylmethyl)sulfonic Acid; Phenylmethanesulphonic Acid; Benzenemethanesulfonic Acid; Benzyl Sulfonic Acid; Toluene-α-sulfonic Acid
EINECS	Contact for details

Quality Control

Our Phenylmethanesulfonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters such as assay, appearance, and impurity profiles are available upon request, supporting your quality assurance and regulatory compliance 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 material is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Melting Point	Contact for details
Heavy Metals	< 20 ppm

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