2-Chloropropanal 2-Chloropropionaldehyde 3-01-00-02691 (Beilstein Handbook Reference) 3-Chloropropanal 683-50-1 BRN 1698446 Propanal, 2-chloro- (9CI) Propionaldehyde, 2-chloro- alpha-Chloropropanal alpha-Chloropropionaldehyde alpha-Chloropropylaldehyde