As an additive to lithium-ion battery electrolyte, its function is to inhibit the decline of the initial capacity of the battery, increase the initial discharge capacity, reduce the expansion of the battery after high temperature placement, and improve the charge and discharge performance of the battery and the number of Chemicalbook cycles. Hydroxyethylation reagents for organic synthesis to synthesize pharmaceutical intermediates. It can also be used as a raw material for a certain heterocyclic compound for the synthesis of gelatin hardening, antihypertensive drugs and new double surfactants