An old-school plasticizer with phthalate-related safety concerns; most brands have phased it out.
Irritation
moderate
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
An old-school plasticizer with phthalate-related safety concerns; most brands have phased it out.
Irritation
moderate
Source
synthetic
Butylphthalimide is a synthetic plasticizer that helps nail products stay flexible and resist chipping, but it has limited safety data and is best used in well-ventilated spaces.
Irritation
low
Source
synthetic
Diisodecyl phthalate is a plasticizer with limited cosmetic use; it is not a typical skincare ingredient and is best avoided due to potential health concerns.
Irritation
low
Source
synthetic
Diisoheptyl Phthalate is a synthetic plasticizer with no proven skincare benefit and potential health concerns; it is best avoided in leave-on products.
Irritation
moderate
Source
synthetic
Ditridecyl phthalate is a plasticizer that helps products spread and flex, but its phthalate nature raises potential endocrine concerns, so many brands avoid it.
Irritation
low
Source
synthetic
Ethyl Tosylamide is a synthetic plasticizer that makes nail polish more flexible and durable, but it can be a skin sensitizer for some people.
Irritation
moderate
Source
synthetic
A synthetic plasticizer found in some nail products; its safety data is limited and it may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Tosylamide helps nail products stay flexible and durable, but it may cause irritation in sensitive individuals and has raised some safety concerns.
Irritation
moderate
Source
synthetic
Triphenyl phosphate is a synthetic plasticizer used in nail products, but it has raised some health concerns due to potential endocrine disruption and skin irritation.
Irritation
moderate
Source
synthetic