Which Mineral Sunscreens Make a Non-Nano Particle Claim?

What do nano and non-nano mean?

In EU cosmetics law, a nanomaterial is intentionally manufactured, insoluble or biopersistent, and has at least one external dimension or an internal structure in the 1–100 nm range. Article 2(1)(k) of Regulation (EC) 1223/2009 supplies that definition. Article 19(1)(g) requires nanomaterial ingredients to be identified with “(nano)” after the ingredient name in the ingredient list, for example “Titanium Dioxide (nano)”. We read these articles in the EU text as consolidated to 30 December 2020 (the UK National Archives’ point-in-time copy, before any UK amendment); the European Commission’s cosmetics guidance also explains the definition and labeling rule.

That EU requirement is not a universal definition of a US “non-nano” marketing claim. The FDA’s nanotechnology guidance says it has not established regulatory definitions for nanomaterial and related terms. Its assessment considers engineered dimensions around 1–100 nm and can also consider size-dependent properties at dimensions up to 1,000 nm. These are assessment considerations, not a sunscreen-label certification.

We did not find an EU-style “(nano)” declaration requirement in the FDA sunscreen labeling guidance reviewed for this guide. The agency’s 2007 Nanotechnology Task Force report recommended handling nano labeling case by case, rather than requiring it across all products. A US ingredient list that simply says zinc oxide or titanium dioxide therefore does not establish particle size.

Micronized is not a measured particle-size result

EltaMD UV Skin Recovery’s 1.7 oz carton says “micronized zinc oxide.” We found no numerical size in that statement and do not count it among the 14 non-nano claims. Likewise, “clear zinc” and “uncoated” are not numerical size disclosures. Badger Active Face Stick’s artwork prints those descriptions, but its typed DailyMed text adds “Non-Nano”; we left it out of this table rather than present the typed wording as a printed-label claim. MDSolarSciences Mineral Crème’s Amazon title says “micronized,” but we could not confirm a particle claim in the brand product-page text we read, so it is also omitted.

No row here supplies an independently verified size distribution, and we did not verify a product explicitly labeled “nano” or a titanium-dioxide-specific non-nano claim for this table. For products with either mineral, see the broader mineral sunscreen list.

Nano versus non-nano: transparency is not a safety ranking

Smaller mineral particles can reduce visible whitening; larger particles tend to leave more white cast. Smijs and Pavel’s review explains how particle size, aggregation, coatings and the surrounding formula affect optical behavior. It does not establish that a non-nano claim makes a sunscreen safer. Smijs and Pavel, 2011, Nanotechnology, Science and Applications 4:95–112.

The FDA’s product-specific approach likewise does not classify all nanotechnology products as inherently harmful or harmless. Choose particle wording as a preference, not a safety score. The labeled SPF and broad-spectrum claim describe protection testing of the finished formula; the mineral percentage and particle claim do not replace them. Our nano-minerals explainer discusses the transparency and safety questions.