Few skincare debates run as hot as mineral versus chemical sunscreen. Both types protect you from UV radiation, and both are regulated and capped by the EU Cosmetics Regulation. But they work differently, they behave differently on the skin – and several chemical filters are currently under formal re-evaluation in the EU. Here is what the ingredient list actually tells you.
Two ways to stop a UV ray
Mineral (physical) filters are inorganic particles that sit in the top layer of the product film and absorb – and to a small extent scatter – UV radiation. Only two are used in practice: Titanium Dioxide and Zinc Oxide.
Chemical (organic) filters are carbon-based molecules that absorb UV radiation and convert it to heat. Common examples in the INCI list are Butyl Methoxydibenzoylmethane (avobenzone), Octocrylene, Homosalate, Ethylhexyl Methoxycinnamate (octinoxate) and Benzophenone-3 (oxybenzone).
Every UV filter is capped by EU law
UV filters are one of the most tightly regulated ingredient groups in cosmetics. Only filters on the EU's approved list (Annex VI of the Cosmetics Regulation) may be used, each with a maximum concentration:
| Filter (INCI) | Type | EU max | Current status |
|---|---|---|---|
| Titanium Dioxide | Mineral | 25% | Approved; powder/inhalable forms under separate scrutiny |
| Zinc Oxide | Mineral | 25% | Approved; classified hazardous to aquatic life (H400/H410) |
| Benzophenone-3 (oxybenzone) | Chemical | 6% | On the EU endocrine disruptor list; under evaluation |
| Octocrylene | Chemical | 10% | Under EU evaluation (suspected PBT/vPvB) |
| Butyl Methoxydibenzoylmethane (avobenzone) | Chemical | 5% | On the EU endocrine disruptor list |
| Homosalate | Chemical | 7.34% | Limit tightened after SCCS re-assessment |
| Ethylhexyl Methoxycinnamate (octinoxate) | Chemical | 10% | Under EU evaluation as potential endocrine disruptor |
| Ethylhexyl Salicylate | Chemical | 5% | Under EU evaluation as potential endocrine disruptor |
The pattern is worth noticing: the two mineral filters have high caps and mainly environmental or inhalation caveats, while several of the most widely used chemical filters are being re-examined for suspected hormonal effects.
What the concerns actually are
Chemical filters under the microscope
- Benzophenone-3 (oxybenzone) is listed on the EU's endocrine disruptor list, and EU evaluators have raised concerns about cumulative exposure and sensitive populations. Its maximum in face products was cut to 6%.
- Octocrylene is under EU evaluation as a suspected persistent, bioaccumulative substance, and the SCCS (the EU's scientific committee for consumer safety) has issued a dedicated safety opinion on it.
- Butyl Methoxydibenzoylmethane (avobenzone) appears on the EU endocrine disruptor list and is also being evaluated for persistence.
- Homosalate had its allowed concentration reduced to 7.34% after the SCCS concluded higher levels were not safe.
None of this means a given bottle of sunscreen is dangerous – the filters remain approved within their limits. It means the science is still moving, and that "SPF 50" alone tells you nothing about which filters are inside.
Mineral filters are not automatically spotless
Zinc Oxide carries official classifications for aquatic toxicity (H400, H410), which matters if you swim in lakes or the sea. Titanium Dioxide is under EU scrutiny for carcinogenicity by inhalation – a concern for loose powders and sprays rather than creams. In a lotion on your skin, both are considered very well tolerated, which is why mineral filters are usually recommended for sensitive skin and children.
How to choose
- Sensitive skin, children, eczema: mineral filters are the safe default. Look for Titanium Dioxide or Zinc Oxide at the top of the INCI list.
- No white cast, light textures: modern chemical filters win on cosmetics. If you want to avoid the most-debated ones, check the label for Benzophenone-3, Octocrylene and Homosalate specifically.
- Environment: some destinations restrict oxybenzone and octinoxate in reef areas; Zinc Oxide's aquatic classification is also worth knowing about.
Read the label in seconds instead
All of this lives in the ingredient list – under names like Butyl Methoxydibenzoylmethane. Skinimalist reads the INCI list for you: scan the label or share a product link, and every UV filter is identified and scored against the official EU classifications, including the ongoing evaluations described above.
Check your sunscreen with Skinimalist. Scan the label or share a link – and see the score, the flagged filters and how well it fits your skin.
Sources: EU Cosmetics Regulation (EC) No 1223/2009, Annex VI (approved UV filters with concentration limits); ECHA CLP harmonised classifications (Annex VI H-codes); ECHA CoRAP evaluations; EU endocrine disruptor lists (edlists.org); SCCS safety opinions on octocrylene and homosalate. This guide is decision support, not medical advice.