Description

Dimethyl Sulfite is a versatile organic sulfur compound widely used as a key reagent and intermediate in advanced chemical synthesis. Its primary value lies in its role as a methylating agent and a protective group for alcohols, offering high selectivity and efficiency in complex reaction pathways. This product is essential for research laboratories and industrial-scale manufacturers in the pharmaceutical, agrochemical, and specialty chemical sectors seeking reliable and high-purity synthetic building blocks.

Application

• Pharmaceutical Intermediate: Employed as a methylating agent in the synthesis of active pharmaceutical ingredients (APIs) and fine chemicals.
• Agrochemical Synthesis: Used in the production of pesticides, herbicides, and fungicides as a key chemical building block.
• Polymer Chemistry: Acts as a modifier and cross-linking agent in the production of specialty polymers and resins.
• Organic Synthesis Reagent: Serves as a solvent and reactant in various organic transformations, including Grignard reactions and esterifications.
• Flavor & Fragrance Industry: Utilized as an intermediate in the synthesis of certain sulfur-containing aroma compounds.
• Electrolyte Additive: Investigated for use in lithium-ion battery electrolytes to improve performance and stability.

Basic Information

Product Name	Dimethyl Sulfite
CAS No.	616-42-2
Molecular Formula	C2H6O3S
Molecular Weight	110.13 g/mol
Synonyms	Sulfurous Acid, Dimethyl Ester; Methyl Sulfite; DMS; Dimethylester kyseliny sirovite; UN 1993; Methoxy(methylsulfinyl)methane; Methyl Sulfite ((MeO)2SO); Dimethyl ester of sulfurous acid
EINECS	210-481-0

Quality Control

Our Dimethyl Sulfite is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed against stringent in-house specifications, which typically include identity confirmation, assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials such as strong oxidizing agents and bases. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to minimize moisture absorption and volatilization.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20D)	1.435 - 1.445
Density (20°C)	1.20 - 1.25 g/mL

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