The World Federation One Stop Fiqh

Ruling 2067

There is no problem in buying and selling oil that has been imported from non-Muslim countries if one does not know it is impure. As for oil and other things that are acquired after the animal has died, such as gelatine, in the event that one acquires them from a disbeliever (kāfir) or they are imported from non-Muslim countries, they are pure and it is permitted to buy and sell them as long as one deems it probable that they have been acquired from an animal which was slaughtered according to Islamic law; however, it is unlawful to consume these things. Furthermore, it is necessary for the seller to tell the buyer how it was acquired in the event that were he not to tell him, the buyer would be at risk of committing an unlawful act or abandoning an obligatory one, similar to what was mentioned in Ruling 2065.