Chemical appearance Acrolein Dimethyl Acetal or 3 3 Dimethoxypropene has a colorless transparent appearance It comes in a liquid form with a strong pungent odour and has a density level of 0862 gmL Other trading names 3 3 Dimethoxypropene 1 Acroleindimenthylacetal Acrolein dimenthyl Acetal 3 3 Dimethoxy Propene 3 3 Dimenthoxyprop 1 ene