1,3-PENTADIENE 1,3-Pentadiene, (cis & trans mixed) 1-Methylbutadiene 4-01-00-00995 (Beilstein Handbook Reference) 504-60-9 BRN 1523657 EINECS 207-995-2 HSDB 6063 Pentadiene, 1,3- Piperylene RCRA waste no. U186 RCRA waste number U186