Key takeaways
- Morocco bans TPO in nail products, aligning with the EU’s cosmetics regulation.
- TPO (Trimethylbenzoyl Diphenylphosphine Oxide) is classified as a CMR category 1B substance by the EU, which is potentially harmful to reproductive health.
- Products containing TPO must be withdrawn from the market immediately, even if already in stock.
- The cosmetics industry faces regulatory tightening across Europe and further afield.
In an official statement, the Moroccan Agency for Medicines and Health Products (AMMPS) has announced an immediate ban on nail products containing Trimethylbenzoyl Diphenylphosphine Oxide (TPO). The prohibition covers the marketing, manufacturing, importation, distribution, and use of all cosmetic products containing this substance.
“The beauty industry must immediately cease using products containing TPO and ensure these are no longer offered to clients,” AMMPS stated.
The agency explained that, following an evaluation of scientific data and international standards, it believes TPO has a concerning toxicological profile.
The announcement coincides with the European Union’s ban on the substance, which also comes into effect from 1 September 2025.
Why has TPO been banned?
Trimethylbenzoyl Diphenylphosphine Oxide (TPO) is a photo-initiator used to cure gel nail polish quickly under UV or LED light, for a glossy, long-lasting finish.
In the EU, TPO has been classified under the European CLP (Classification, Labelling and Packaging) regulation as a CMR (Carcinogenic, Mutagenic and Reproductive toxic) category 1B substance, meaning it is potentially toxic to reproduction. The classification is based on animal studies.
While TPO is not classified as carcinogenic or mutagenic, it is considered potentially harmful to reproductive health. Further research is needed to confirm its effects on humans.
The European Cosmetics Regulation (1223/2009) states that substances classified as CMR category 1A or 1B are automatically banned in cosmetic products.
“From 1 September 2025 onwards, all placing on the market and making available in the course of commercial activity must stop, even for products already in stock or purchased before that date,” states the European Commission (EC).
In March 2014, the Scientific Committee on Consumer Safety had deemed TPO safe in concentrations up to 5%. However, this finding has now been overruled by the new classification.
The ban on TPO is also part of the EU’s proposed Omnibus Act VIII, which updates the Cosmetics Regulation and will impact formulation, labelling, and marketability of personal care products from 1 May 2026.
