Description

Ethylene Phosphate (CAS No. 6711-47-3) is a high-purity organophosphorus compound with the molecular formula C₂H₅O₄P and IUPAC name 2-hydroxy-1,3,2λ⁵-dioxaphospholane 2-oxide. This cyclic phosphate ester is widely utilized in electrochemical applications, particularly as an additive in lithium-ion battery electrolytes to enhance thermal stability and cycling performance. Its unique structure facilitates the formation of a stable solid-electrolyte interphase (SEI) layer on electrode surfaces, improving battery lifespan and safety. Ethylene phosphate is supplied as a colorless to pale-yellow liquid with ≥98% purity, rigorously tested via GC, NMR, and ICP-MS to ensure consistency for research and industrial use. Suitable for use under inert conditions, it is packaged in sealed amber glass bottles to prevent moisture absorption and degradation.

Properties

• CAS Number: 6711-47-3
• Complexity: 100
• IUPAC Name: 2-hydroxy-1,3,2lambda5-dioxaphospholane 2-oxide
• InChI: InChI=1S/C2H5O4P/c3-7(4)5-1-2-6-7/h1-2H2,(H,3,4)
• InChI Key: UYXQLQUXXCIFQM-UHFFFAOYSA-N
• Exact Mass: 123.99254563
• Molecular Formula: C2H5O4P
• Molecular Weight: 124.03
• SMILES: C1COP(=O)(O1)O
• Topological: 55.8
• Monoisotopic Mass: 123.99254563
• Synonyms: ethylene phosphate, 6711-47-3, ethylene hydrogen phosphate, SCHEMBL811704, UYXQLQUXXCIFQM-UHFFFAOYSA-N, DTXSID001315898, 2-Hydroxy-1,3,2-dioxaphospholane 2-oxide

Application

Ethylene phosphate serves as a critical electrolyte additive in lithium-ion batteries, where it improves thermal stability and reduces capacity fade. It is also studied as a flame retardant in polymer composites due to its phosphorus content. Researchers employ it in organic synthesis as a phosphorylating agent or intermediate for specialty chemicals.

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