Description

4,5-Dimethyl-1,3,2-dioxathiolane 2-oxide (CAS No. 4440-90-8) is a high-purity cyclic sulfite ester with the molecular formula C₄H₈O₃S. This specialized organosulfur compound is widely utilized in organic synthesis, electrolyte formulations, and as a stabilizing agent in advanced chemical processes. Its unique cyclic structure and sulfite functionality make it a valuable intermediate for researchers developing novel materials, battery electrolytes, and pharmaceutical precursors. Our product is rigorously tested to ensure exceptional purity and consistency, meeting the stringent requirements of industrial and academic laboratories. Available in various quantities with detailed analytical documentation, including ¹H NMR, ¹³C NMR, and HPLC data.

Properties

• CAS Number: 4440-90-8
• Complexity: 102
• IUPAC Name: 4,5-dimethyl-1,3,2-dioxathiolane 2-oxide
• InChI: InChI=1S/C4H8O3S/c1-3-4(2)7-8(5)6-3/h3-4H,1-2H3
• InChI Key: SAPINXZHMGNTEC-UHFFFAOYSA-N
• Exact Mass: 136.01941529
• Molecular Formula: C4H8O3S
• Molecular Weight: 136.17
• SMILES: CC1C(OS(=O)O1)C
• Topological: 54.7
• Monoisotopic Mass: 136.01941529
• Synonyms: 4,5-Dimethyl-1,3,2-dioxathiolane 2-oxide, 4440-90-8, sym-Dimethylethylene sulfite, 4,5-DIMETHYL-1,3,2??-DIOXATHIOLAN-2-ONE, 2,3-Butanediol, cyclic sulfite, 2, cyclic sulfite, EINECS 224-661-1, MFCD00044413, 1,3,2-Dioxathiolane, 4,5-dimethyl-, 2-oxide, erythro-2,3-butanediyl sulfite, SCHEMBL4889631, DTXSID70963214, NSC56552, NSC 56552, NSC-56552, NSC527769, AKOS030229147, NSC-527769, AS-64821, 4,5-dimethyl-2-oxo-1,3,2-dioxathiolane, 4,5-Dimethyl-1,3,2-dioxathiolane2-oxide, DB-070550, NS00047788, 1,2-Dioxathiolane, 4,5-dimethyl-, 2-oxide, 4,5-dimethyl-1,3,2|E?-dioxathiolan-2-one, 4,5-Dimethyl-1,3,2-dioxathiolane 2-oxide #, E85528, 4,5-Dimethyl-1,3,2lambda~4~-dioxathiolan-2-one

Application

4,5-Dimethyl-1,3,2-dioxathiolane 2-oxide serves as a key precursor in the synthesis of sulfite-based electrolytes for lithium-ion batteries, enhancing thermal stability and cycle life. It is also employed as a protecting group for diols in carbohydrate chemistry and as a chiral building block in asymmetric synthesis. Researchers utilize this compound to investigate sulfur-containing heterocycles in material science applications.

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