CH3CH=C=C=O is a chemical compound registered under CAS number 78957-08-1, with the molecular formula C4H4 O and a molecular weight of about 68.07 g/mol. It is also known as 1,2-Butadienal. NewsChem supplies CH3CH=C=C=O for laboratory research and bulk production; product code 653501. Send an inquiry for purity, packaging, price and lead time.