… Petroleum oils and oils obtained from bituminous minerals, other than crude; preparations not …
Explanatory notes
… 27.10 ‑ Petroleum oils and oils obtained from bituminous minerals, other than crude; preparations not elsewhere … by cracking, reforming, etc.). The heading includes mixed alkylenes , called tripropylene, tetrapropylene , di-isobutylene , tri-isobutylene , etc. These are mixtures of unsaturated acyclic hydrocarbons (octylenes, …