TPO, listed as Trimethylbenzoyl Diphenylphosphine Oxide, has been prohibited in cosmetics on the EU market since 1 September 2025. This guide explains the EU framework and practical product questions, without assuming the same rules for Switzerland or assessing the personal effects of past use.
Understand the core rule
The European Commission’s questions and answers dated 7 August 2025 explain Regulation (EU) 2025/877. From the applicable date, TPO-containing cosmetics cannot be offered or made available during commercial activities in the EU. The explanation includes nail salons using them on customers and does not provide a general use-up exemption for previously purchased stock. That legal point is separate from a personal medical prediction or a rule for every country.
Identify the country and date
Record where the treatment or sale takes place. A German-language shop does not by itself establish the relevant legal framework. For Swiss purchases or treatment, consult current Swiss authority information rather than applying this EU article automatically. This is about jurisdiction, not finding a workaround. Start with the concrete provider, place and date rather than a shortened social-media slogan.
Ask about the actual product
Before treatment, request the full product line and version. If unclear, ask for its label or traceable manufacturer information. “We use good brands” is too broad, and a certificate unrelated to the bottle offers little help. Matching the name, batch and current packaging supports a useful enquiry without assuming wrongdoing.
Check old stock directly
A familiar shade name or a photograph of newer packaging cannot establish the formulation of an older bottle. Check the actual product, purchase date and batch, and ask the manufacturer if necessary. Resolve disposal questions through product guidance and the appropriate local service. Do not remix old products or pass them on with invented assurances of safety.
Keep TPO-free claims in proportion
A claim about one substance does not answer every question about other ingredients, intended use, individual tolerance or the product system. A free-from label does not turn a professional process into a suitable home treatment. Continue to check the complete instructions and the actual product rather than turning one true fact into a general safety guarantee.
Prepare a factual enquiry
Ask which labelling and intended use apply to the named product and batch, adding a relevant packaging photograph if needed without sharing other people’s personal data. Keep the response and date privately. If the provider cannot clarify, do not decide under time pressure. A relevant market-surveillance or consumer-advice body may be more useful than an unsupported public accusation.
A regulatory date cannot diagnose the effect of a previous treatment. If symptoms occur, collect product information and seek medical assessment. Without symptoms, this article still cannot calculate an individual risk. Check actual information again when buying later; an old screenshot does not establish the status of every future bottle.
Frequently asked questions
May an EU salon use up old TPO stock?
Published Commission guidance says the prohibition also covers professional application of previously purchased stock. Ask about the actual label in a specific case. This guide is not an individual legal assessment.
Does this automatically apply to Switzerland?
No. This article explains the EU framework. Current Swiss rules need separate checking for Swiss purchases or treatments. Language region and legal jurisdiction are different things.
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