出典:Wiktionary
出典:『Wiktionary』 (2009/08/04 22:22 UTC 版)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/22 13:11 UTC 版)
Methacrolein, or methacrylaldehyde, is an unsaturated aldehyde. It is a clear, colorless, flammable liquid that is present in cigarettes when smoking.