Description

o-Toluidinomethanesulphonic Acid is a specialized organic sulfonic acid derivative, serving as a crucial intermediate in fine chemical synthesis. Its value lies in its unique reactivity, enabling the introduction of the methanesulfonyl (mesyl) group into complex molecular architectures. This compound is essential for manufacturers in the pharmaceutical and agrochemical sectors, where it is used to create active ingredients and advanced intermediates requiring specific functionalization.

Application

• Pharmaceutical Intermediate: Key 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.
• Dye and Pigment Manufacturing: Acts as an intermediate in the creation of specific azo dyes and organic pigments.
• Chemical Research & Development: A valuable reagent for organic synthesis in R&D laboratories for novel compound discovery.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers for specialty applications.

Basic Information

Product Name	o-Toluidinomethanesulphonic Acid
CAS No.	94-57-5
Molecular Formula	C8H11NO3S
Molecular Weight	201.24 g/mol
Synonyms	2-Methylbenzenaminium methanesulfonate; o-Toluidine methanesulfonate; 2-Methylanilinium methanesulfonate; Methanesulfonic acid, compd. with 2-methylaniline (1:1); 2-Aminotoluene methanesulfonate; o-Tolylaminium methanesulfonate; Benzenaminium, 2-methyl-, methanesulfonate (1:1)
EINECS	202-342-5

Quality Control

Our o-Toluidinomethanesulphonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming compliance with agreed specifications. We support our global clients with documentation relevant to their 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) and should be handled in a dry environment to prevent degradation. Keep away from strong bases and oxidizing agents.

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

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