Description

Description

Propylene Sulfite (CAS 40811-14-1) is a high-purity cyclic sulfite ester with the molecular formula C₃H₆O₃S, also known by its IUPAC name 4-methyl-1,3,2-dioxathiolane 2-oxide. This specialized chemical is widely utilized in advanced electrochemical applications, particularly as a key additive in lithium-ion battery electrolytes due to its ability to enhance electrode stability and improve cycle life. Its cyclic structure and sulfite functional group contribute to its effectiveness as a film-forming agent on anode surfaces.

Our Propylene Sulfite is synthesized under stringent quality controls to ensure >99% purity, making it ideal for research and industrial applications. It is supplied as a clear, colorless liquid with a molecular weight of 122.14 g/mol, boiling point of 120-122??C (10 mmHg), and density of 1.3 g/cm³. Proper storage under inert atmosphere is recommended to maintain stability.

Synonyms include: 1,2-Propanediol sulfite, AI3-22919, and SULFUROUS ACID, CYCLIC ESTER with 1,2-PROPANEDIOL.

Application

Propylene Sulfite is primarily employed as an electrolyte additive in lithium-ion batteries, where it forms a stable solid-electrolyte interphase (SEI) layer on graphite anodes, preventing decomposition and improving battery performance. It also finds use in organic synthesis as a sulfonating agent and in polymer chemistry as a reactive intermediate. Researchers value its role in studying interfacial chemistry in energy storage systems.

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