1,3-DIOXOLANE 1,3-Dioxacyclopentane 1,3-Dioxolan 1,3-Dioxole, dihydro- 646-06-0 CCRIS 4912 Dioxolan [Czech] Dioxolane Dioxolane [UN1166] [Flammable liquid] EINECS 211-463-5 Ethylene glycol formal Formal glycol Glycol formal Glycol methylene ether Glycolformal HSDB 5737 UN1166