Acetaldehyde kuj paub tias yog ethanal, yog ib qho organic tshuaj compound nrog cov mis CH3CHO, qee zaum sau los ntawm chemists li MeCHO (Me = methyl).Nws yog cov kua uas tsis muaj xim lossis roj, kub kub nyob ze ntawm chav tsev kub.Nws yog ib qho tseem ceeb tshaj plaws aldehydes, tshwm sim dav hauv cov xwm txheej thiab raug tsim los ntawm kev lag luam loj.