It is the best alcohol denaturant, the most bitter substance known in the world, and it becomes unbearable when the concentration in solution reaches 0.003%. It is used as a bittering agent (or an aversion agent) in cosmetic products, which prevents poisoning caused by accidental ingestion by humans and animals.
It is used as an aversion agent in cosmetics, beauty and hair care products, such as hair spray, hair dye, nail polish, mascara, serum, make-up, sunscreen water (cream), perfume, anti-aging hydrating masks and so on.