Formalin

Formalin : Formalin is a mix of water and formaldehyde. The liquid is used as an embalming fluid and for the preservation of animal specimens and tissue samples. It is also used, generally in a dilute form, as a disinfectant, and anti-bacterial  in many cosmetic products. It’s a carcinogen and has causes allergic and immune system toxicity. Skin Deep score: 10