(E)-Crotonaldehyde (E)-Crotonaldehyde (IUPAC) 123-73-9 2-Butenal, (2E)- 2-Butenal, (E)- Aldehyde crotonique [French] CCRIS 4501 CROTONALDEHYDE, (E)- Crotonaldehyde Crotonaldehyde, cis- E-2-Butenal EINECS 204-647-1 HSDB 2871 NCI-C56279 RCRA waste no. U053 RCRA waste number U053 Topanel Topanel CA UN 1143 beta-Methyl acrolein trans- Crotonal trans-2-Butenal trans-Crotonaldehyde