Synthetic fragrance ingredient with a strong floral scent. Its use in cosmetics is restricted due to concerns over irritation and allergic reactions. The presence of butylphenyl methylpropional must be indicated in the list of ingredients if the product contains more than 0.001% and is meant to be left on skin; it also must be listed if the product contains more than 0.01% and is meant to be rinsed, like cleansers and shampoos. 
- Yazar K, Johnsson S, Lind M, Boman A, Lidén C. Preservatives and fragrances in selected consumer-available cosmetics and detergents. Contact Dermatitis. 2011;64(5):265-72.