Diethyl Phthalate
Phthalate; Solvent; Fragrance Fixative
DEP does not have the same reproductive-toxicity classification as DBP or DEHP, and safety assessments have supported certain cosmetic uses. However, it belongs to the phthalate family and has ongoing exposure and endocrine-related research considerations, supporting a cautious classification under stricter clean-beauty standards.
Why Oh Daisey rates it this way
DEP does not have the same reproductive-toxicity classification as DBP or DEHP, and safety assessments have supported certain cosmetic uses. However, it belongs to the phthalate family and has ongoing exposure and endocrine-related research considerations, supporting a cautious classification under stricter clean-beauty standards.
What it does
Used as a solvent, denaturant, and fragrance fixative to improve fragrance longevity.
How to read this rating
This rating reflects the Oh Daisey ingredient standard and the evidence currently available for cosmetic use. Product safety can also depend on concentration, exposure route, formulation, manufacturing quality, and individual sensitivity.