Is it permissible to obey my father’s order to buy him tobacco?

Question 20: Is it permissible to buy tobacco for my father as he asks me to do so?

Answer: It is not permissible to buy anything prohibited for the sake of your father whether it is tobacco, opium, hashish, alcohol or the like even if he asks you to do so. It was authentically reported that the Prophet (peace be upon him) said… read more here.

Buying alcohol for using it as fuel or in some industries

Question 17: Is it permissible to sell alcohol (which is an intoxicant) for the sake of using it as fuel or in other industries? Is it permissible to sell it to those who will also use it as fuel?

Answer: Selling alcohol or any intoxicant is prohibited. Whoever has any of these things should destroy them as he is not permitted to sell them. This is due to Allaah’s saying… read more here.

Selling foods that contain pork or alcoholic ingredients

Question 14: Is it permissible to sell food which contains pork or alcohol? There are many Muslims in America who own grocery stores where they sell beer, pork, and tobacco, or they work in such stores.

Answer: It is not permissible to sell items that are forbidden to eat or use including the items mentioned in the question… read more here.