Synonym(s): 2-Methyl-1,3-butadiene Formula: C5H8 Formula weight: 68.12 Purity: 99%, stab. with ca 0.02% 4-tert-butylcatechol CAS Number: 78-79-5 UN Number: UN1218 Hazard Class: 3 Packing Group: I Harmonized Tariff Code:  2901.24 Hazard Statements: H224-H350-H341 …