From an EU regulatory perspective, however, the distinction between “mineral” and “chemical” sunscreens is less important than it may appear. UV filters are regulated individually under the EU Cosmetics Regulation, while additional requirements can apply when certain filters are used in nano form.
Environmental considerations are also becoming increasingly relevant, particularly as concerns about the impact of some sunscreen ingredients on aquatic ecosystems continue to develop.
How the EU Regulates Sunscreen Filters
The EU does not have a separate regulatory category for “mineral” and “chemical” sunscreens. Instead, authorised UV filters are listed individually in Annex VI of Regulation (EC) No 1223/2009 and are subject to safety assessment by the Scientific Committee on Consumer Safety (SCCS).
The commonly used terms can nevertheless be useful when discussing the technology behind sunscreen formulations.
Organic UV filters, often called chemical filters, primarily protect the skin by absorbing UV radiation and converting the energy into a small amount of heat. Examples include avobenzone, homosalate, octocrylene, octisalate, octinoxate and oxybenzone.
Inorganic or mineral filters, principally zinc oxide and titanium dioxide, also absorb UV radiation and can scatter or reflect part of the incoming radiation. Sunscreens may use either type of filter or combine several filters to achieve the desired UV protection and formulation characteristics.
Importantly, the terms “chemical” and “mineral” are largely consumer-facing rather than regulatory classifications. A mineral UV filter is, of course, also a chemical substance, while describing an entire product as a “mineral sunscreen” does not mean that every ingredient in the formulation is mineral-derived.
“Reef Safe” Is Not an EU Regulatory Category
Environmental claims create a separate issue.
The term “reef safe” has no specific legal definition under EU cosmetics legislation. The Cosmetics Regulation primarily addresses the safety of cosmetic products and their ingredients for human health; it does not establish a general category of UV filters that can be described as safe for coral reefs or marine ecosystems.
This distinction is important for brands considering environmental marketing claims. The fact that a sunscreen uses zinc oxide rather than an organic UV filter does not, by itself, demonstrate that the finished product has no environmental impact.
At the same time, environmental concerns surrounding individual UV filters are receiving increasing regulatory attention. In 2025, the French agency ANSES submitted a proposal to the European Chemicals Agency (ECHA) concerning a potential REACH restriction on octocrylene, including a proposed concentration limit for cosmetic products intended to address environmental concerns. The proposal remains part of the regulatory process and should not be presented as an existing EU-wide prohibition.
For cosmetic companies, the practical lesson is straightforward: environmental claims should be supported by appropriate evidence rather than based solely on whether a formula uses mineral or organic UV filters.
What Brands Need to Know About Nano UV Filters
Nanomaterials introduce another layer of EU compliance.
Titanium dioxide (nano) and zinc oxide (nano) are authorised as UV filters under Annex VI of the Cosmetics Regulation, subject to specific conditions. Both substances have a maximum concentration of 25% and restrictions intended to prevent consumer exposure to the lungs through inhalation.
As a result, the authorised nano forms can be used in products such as creams, lotions and sticks, but the relevant conditions restrict applications that could expose users to inhalable particles, such as certain sprayable products.
The use of nanomaterials also creates additional notification and labelling obligations. Under Article 16 of Regulation (EC) No 1223/2009, cosmetic products containing nanomaterials require a dedicated notification to the European Commission, in addition to the standard Cosmetic Products Notification Portal (CPNP) notification.
The ingredient list must also identify a nanomaterial by adding “(nano)” after the ingredient name.
What This Means for Sunscreen Manufacturers
For brands developing or reformulating sunscreens for the EU market, the mineral-versus-organic debate is only one part of the compliance assessment.
Companies should verify that every UV filter used in the formulation is authorised under Annex VI and that its specific conditions of use are respected. Where nano forms are involved, manufacturers must additionally assess the applicable restrictions, notification requirements and labelling rules.
Environmental claims require a separate assessment. Terms such as “reef safe” should not be treated as automatic consequences of using mineral UV filters, particularly where the scientific and regulatory landscape continues to evolve.
For sunscreen brands, therefore, the safest approach is to evaluate the individual UV filter, its form and concentration, the finished formulation, the method of application and any environmental claims rather than relying on broad categories such as “mineral” or “chemical.”
