Selling an item which contains a Haraam substance.
Question:
Can you sell an item that has a small percentage of Haraam?
Answer:
No, it is not permissible to sell such an item. Even though one sells it without seeking any profit from it, it is totally Haraam.
(Nizaamul Fatawaa – Pg. 186)
And Allah knows best.
Mufti Waseem Khan