2,3-BUTANEDIOL 2,3-Butylene glycol 2,3-Dihydroxybutane 4-01-00-02524 (Beilstein Handbook Reference) 513-85-9 98923-25-2 BRN 0969165 CCRIS 5501 Dimethylene glycol Dimethylethylene glycol EINECS 208-173-6 HSDB 1505 Pseudobutylene glycol Sym-dimethylethylene glycol