Almost forgot —
ISOPROPYL ALCOHOL — Although a few alcohols are safe and mild, the isopropyl is one of the penetrating and poisonous ones often used in attempts to dissolve some of the “grayish waxy buildup” of petroleum in the skin. Anything harsh enough for that also dissolves the skin’s natural moisturizers, destroys its pH balance, and leaves it vulnerable to infection. It often stimulates some sebum oil glands to overproduce, resulting in chronic oily skin in those areas, and setting up yet another vicious cycle where the user thinks more and more isopropyl or other harsh astringents are needed. Isopropyl alcohol is derived from petroleum. It is used in antifreeze and shellac.
Isopropyl alcohol is used as rubbing alcohol.