DBP 4 May 2021 Dibutyl phthalate (DBP) – A plasticiser. There are many phthalates, some not appropriate for cosmetics. This version is suitable but has mostly been removed from nail polish due to association with non-cosmetic versions. Related Articles: The Rise of Nail Treatment Trends7 free! 10 free! 99 free! What is the ‘deal’ here?The 3-Free Myth