TPO in Nail Products — Is It Safe?
Also known as: Trimethylbenzoyl Diphenylphosphine Oxide, 2,4,6-Trimethylbenzoyl-diphenylphosphine oxide
About TPO
TPO (Trimethylbenzoyl Diphenylphosphine Oxide) is a photoinitiator used in UV/LED curable gel nail products to initiate polymerization upon light exposure. It has been classified as a potential skin sensitizer, and there are concerns about endocrine-disrupting properties. The EU has tightened restrictions on its use in cosmetics. Incomplete curing (under-curing a gel layer) can leave residual unreacted TPO, significantly increasing dermal exposure risk.
TPO-Free Alternatives
These verified HEMA-free products do not contain TPO.
FAQ
What is TPO?
TPO (Trimethylbenzoyl Diphenylphosphine Oxide) is a photoinitiator used in UV/LED curable gel nail products to initiate polymerization upon light exposure. It has been classified as a potential skin sensitizer, and there are concerns about endocrine-disrupting properties. The EU has tightened restrictions on its use in cosmetics. Incomplete curing (under-curing a gel layer) can leave residual unreacted TPO, significantly increasing dermal exposure risk.
How dangerous is TPO in nail products?
TPO is classified as medium risk in our system. Photoinitiator used in UV/LED gel systems. Potential sensitizer and endocrine disruptor concern.
What are other names for TPO on ingredient labels?
TPO may also appear as: Trimethylbenzoyl Diphenylphosphine Oxide, 2,4,6-Trimethylbenzoyl-diphenylphosphine oxide.