Chlorphenesin is a preservative and cosmetic biocide that helps prevent the growth of microorganisms. In cosmetics and personal care products, Chlorphenesin is used in the formulation of aftershave lotions, bath products, cleansing products, deodorants, hair conditioners, makeup, skin care products, personal cleanliness products, and shampoos. Chlorphenesin has been reported to cause irritation and contact dermatitis in some people, particularly those with sensitive and dry skin. The Cosmetic Ingredient Review (CIR) expert panel released a safety assessment in October 2012, however, that stated chlorphenesin at 0.3 percent (as it exists in personal care products) was classified as having “negligible dermal irritation potential.”