… bituminous minerals, other than crude; preparations not elsewhere specified or included, containing by weight 70 % … oils or of oils obtained from bituminous minerals, these oils being the basic constituents of the preparations; …
Explanatory notes
… minerals. These oils, which are more or less liquid or semi-solid, consist predominantly of non-aromatic … impurities (e.g., treatment with acids or alkalis, with selective solvents, with zinc chloride, with absorbent … re-distillation), provided this treatment does not produce separate chemically defined compounds in a pure or …