Subheading 290110: Acyclic Hydrocarbons; Saturated
Subheading 290121: Acyclic Hydrocarbons; Unsaturated, Ethylene
Subheading 290122: Acyclic Hydrocarbons; Unsaturated, Propene (Propylene)
Subheading 290123: Acyclic Hydrocarbons; Unsaturated, Butene (Butylene) and Isom … etc.
Subheading 290124: Acyclic Hydrocarbons; Unsaturated, Buta-1,3-diene and Isopren … etc.
Subheading 290129: Acyclic Hydrocarbons; Unsaturated, N.E.C. in Heading no. 2901