Iso Butylene Stable. Highly flammable the feedstock for production of polybutene an intermediate in the manufacturing of mtbe Iso Butylene,Stable. Highly flammable - readily forms an explosive mixture with air. Incompatible with strong oxidizing agents.2-METHYLPROPENE;2-METHYL-1-PROPENE;HP-ISOBUTYLENE;ISOBUTENE;ISOBUTYLENEIsobutylene or isobutene is the feedstock for production of polybutene ( ...