Description

Dimethyl(Methylthio)Sulfonium Tetrafluoroborate is a versatile and highly reactive sulfonium salt, primarily valued as a powerful and selective methylating agent in advanced organic synthesis. Its unique reactivity profile makes it indispensable for introducing methyl groups under mild conditions where other reagents may fail. This compound is critical for researchers and process chemists in the pharmaceutical, agrochemical, and specialty chemical industries, enabling the synthesis of complex molecules, active pharmaceutical ingredients (APIs), and novel materials.

Application

• Pharmaceutical Intermediate Synthesis: Key reagent for the methylation of heterocycles, phenols, amines, and carboxylic acids in the production of active pharmaceutical ingredients (APIs).
• Agrochemical Manufacturing: Used in the synthesis of herbicides, fungicides, and pesticides where specific methylation steps are required.
• Material Science Research: Employed in the development of advanced polymers, liquid crystals, and ionic liquids as a functionalization agent.
• Fine Chemical Production: Facilitates methylation reactions in the synthesis of dyes, flavors, fragrances, and other high-value specialty chemicals.
• Laboratory-scale Organic Synthesis: A preferred reagent in academic and R&D settings for constructing complex molecular architectures due to its reliability and selectivity.
• Process Chemistry Optimization: Used to develop scalable and efficient methylation protocols in pilot plants and commercial manufacturing.

Basic Information

Product Name	Dimethyl(Methylthio)Sulfonium Tetrafluoroborate
CAS No.	5799-67-7
Molecular Formula	C3H9BF4S2
Molecular Weight	188.04 g/mol
Synonyms	Dimethyl(methylthio)sulfanium tetrafluoroborate; Methyl(dimethylsulfonio)methylide Tetrafluoroborate; (Methylthio)dimethylsulfonium Tetrafluoroborate; DMTST; Dimethylmethylthiosulfonium Tetrafluoroborate; Sulfonium, dimethyl(methylthio)-, tetrafluoroborate(1-); Methyl(dimethylsulfoniummethylide) Tetrafluoroborate
EINECS	Contact for details

Quality Control

Our Dimethyl(Methylthio)Sulfonium Tetrafluoroborate is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high reactivity. Each lot is analyzed to confirm identity, purity, and absence of critical impurities. Certificates of Analysis (COA) documenting comprehensive testing results, including assay by titration and identification by IR spectroscopy, are provided with every shipment. We adhere to current Good Manufacturing Practices (cGMP) where applicable to support our customers in regulated industries.

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). This product is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere (e.g., nitrogen or argon) in a desiccator to prevent decomposition. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (Titration)	≥ 98.0 %
Water Content (KF)	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1 %

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