Description

Methyl Benzenesulfonate is an important organic sulfonate ester, widely recognized by its CAS registry number 80-18-2. This versatile chemical intermediate is valued for its role as an effective methylating agent and its utility in synthesizing more complex sulfonated compounds. It is a critical raw material for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking reliable and high-purity building blocks for their processes.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and other drug substances, particularly where a methyl or benzenesulfonyl group needs to be introduced.
• Agrochemical Synthesis: Serves as a key precursor in the production of certain herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Manufacturing: Acts as an intermediate in the production of sulfonated dyes and organic pigments.
• Polymer Modification: Employed in the synthesis of specialty polymers and as a modifier to impart specific properties to polymer chains.
• Chemical Research & Development: Utilized in organic synthesis laboratories as a reagent for methylation and sulfonylation reactions.
• Surfactant and Detergent Intermediate: Can be used in the production pathway for certain anionic surfactants.

Basic Information

Product Name	Methyl Benzenesulfonate
CAS No.	80-18-2
Molecular Formula	C7H8O3S
Molecular Weight	172.20 g/mol
Synonyms	Methyl phenylsulfonate; Benzenesulfonic acid methyl ester; Methyl benzenesulphonate; Toluene-4-sulfonic acid methyl ester (isomer); Methyl tosylate (common name for isomer); Methyl benzene-1-sulfonate; Methyl ester of benzenesulfonic acid
EINECS	201-258-5

Quality Control

Our Methyl Benzenesulfonate is produced and handled under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. Certificates of Analysis (COA) documenting these results are available for every shipment, providing full traceability and compliance assurance for our global B2B clients.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (typically 15-25°C). Keep away from heat, sparks, and open flame. Separate from strong bases, strong oxidizing agents, and strong reducing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 1.0%
Density	~1.27 g/cm³ at 20°C

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