1,4-Bis(beta-hydroxyethoxy)-2-butyne 1,4-Di(beta-hydroxyethoxy)-2-butyne 1606-85-5 2,2'-(2-Butyne-1,4-diyldioxy)diethanol 2,2'-But-2-ynylenedioxydiethanol EINECS 216-526-0 Ethanol, 2,2'-(2-butyne-1,4-diylbis(oxy))bis- Ethanol, 2,2'-(2-butynylenedioxy)di- (8CI) NSC 73709