Acyclic hydrocarbons

290110 Acyclic hydrocarbons; saturated 290121 Acyclic hydrocarbons; unsaturated, ethylene 290122 Acyclic hydrocarbons; unsaturated, propene (propylene) 290123 Acyclic hydrocarbons; unsaturated, butene (butylene) and isomers thereof 290124 Acyclic hydrocarbons; unsaturated, buta-1,3-diene and isoprene 290129 Acyclic hydrocarbons; unsaturated, n.e.c. in heading no. 2901