Slack wax (råolie), syrebehandlet (CAS-nr. 90669-77-5), medmindre hele raffineringsforløbet kendes, og det kan påvises, at stoffet, hvoraf det er fremstillet, ikke er kræftfremkaldende
Slack wax (petroleum), acid-treated (Cas No 90669-77-5), except if the full refining history is known and it can be shown that the substance from which it is produced is not a carcinogen