| 2905.14.50 | 10 | 2-Methylpropan-1-ol (Isobutyl alcohol) | kg | | | |
| 2912.19.40 | 00 | Isobutanal | kg | 5.5% | Free (A,AU,BH,CA, CL,E,IL,J,JO, MA,MX,P) 3.1% (SG) | 61.5% |
| 2914.13.00 | 00 | 4-Methylpentan-2-one (Methyl isobutyl ketone) | kg | 4% | Free (A*,AU,BH, CA,CL,E,IL,J,JO, MA,MX,P,SG) | 20% |
| 2915.39.70 | 00 | Isobutyl acetate | kg | 5.5% | Free (A,AU,BH,CA, CL,E,IL,J,JO, MA,MX,P) 2.8% (SG) | 40% |
| 3902.20 | | Polyisobutylene: | | | | |
| 4002.31.00 | 00 | Isobutene-isoprene (butyl) rubber (IIR); halo-isobutene-isoprene rubber (CIIR or BIIR): | | | | |
| 4002.31.00 | 00 | Isobutene-isoprene (butyl) rubber (IIR) | kg | Free | | 20% |
