Titanium Dioxide

What it is

Titanium dioxide is an inorganic white pigment refined from titanium ores. It scatters light extremely efficiently, which makes it both the standard white colourant in cosmetics and, in finer grades, a broad-spectrum mineral sunscreen filter. In a face mask it is normally there to make the product opaque and white rather than to protect from the sun. It is insoluble, chemically stable and does not penetrate intact skin.

What it does well

• Stays on the skin surface and does not enter the body through intact skin

  Reviews of human and animal studies find that titanium dioxide, including nano grades, does not penetrate beyond the outer stratum corneum to living cells and does not reach the circulation, in healthy or in compromised skin. This is the key reason topical use is treated very differently from inhalation or ingestion.

  Strong evidence

• Effective broad-spectrum mineral UV filter

  Its efficacy in preventing sunburn and reducing skin cancer risk is well established, and the SCCS accepts it as safe on skin at up to 25%. It is also a non-sensitiser and mild to non-irritant.

  Strong evidence

• Gives clean opacity and coverage without dyes

  As an inert mineral pigment it delivers whiteness and opacity with no known allergy risk, which is why it is used across products aimed at sensitive skin.

  Strong evidence

Worth knowing

• The concern is inhaling the fine powder, not applying the cream

  The SCCS assessed titanium dioxide in products that lead to inhalation and concluded that pigmentary TiO2 up to 25% in a loose face powder is safe for consumers, but that 25% in a hair styling aerosol spray is not - safe levels there being 1.4% for consumers and 1.1% for hairdressers. EU law reflects exactly this split. A wet mask, cream or paste does not create respirable dust.

  Matters most toUsers of loose mineral powders and aerosol sprays; not relevant to cream, gel or sheet masks.

• Nano grades carry extra conditions

  Nano titanium dioxide is permitted as a UV filter up to 25% but only in specified rutile forms with defined coatings, low photocatalytic activity and no use in applications that could expose the lungs. Products containing it must show '(nano)' after the ingredient name on the label.

  Matters most toAnyone wanting to avoid nanomaterials; check for '(nano)' in the ingredient list.

• The food ban on E 171 is often mistaken for a cosmetic ban

  EFSA concluded in 2021 that a genotoxicity concern for swallowed titanium dioxide could not be ruled out, and Commission Regulation (EU) 2022/63 removed E 171 from the list of permitted food additives. That decision is about eating it. Titanium dioxide remains authorised in EU cosmetics as a colourant and UV filter, because it is not absorbed through skin. Separately, the EU courts annulled its harmonised classification as a category 2 inhalation carcinogen - the General Court in November 2022, confirmed by the Court of Justice on 1 August 2025 - though the cosmetic powder restriction introduced on the back of that classification currently remains on the books.

  Matters most toAnyone who has read that titanium dioxide is 'banned in Europe' and assumed that covers skincare.

Where the EU stands

Sources (3)

Every link goes to the original: a journal, a PubMed record or an EU document.

1. [1]
   Opinion on Titanium dioxide (TiO2) used in cosmetic products that lead to exposure by inhalation (SCCS/1617/20)

   SCCS - Scientific Committee on Consumer Safety, European Commission · 2020

   Pigmentary titanium dioxide up to 25% in a loose face powder is safe for consumers, but 25% in a hair styling aerosol spray is not; safe spray levels are 1.4% for consumers and 1.1% for hairdressers.

2. [2]
   Safety of titanium dioxide nanoparticles in cosmetics

   Journal of the European Academy of Dermatology and Venereology · 2019 · doi:10.1111/jdv.15943

   Most human and animal studies show nano titanium dioxide does not penetrate beyond the stratum corneum or reach the circulation, and the SCCS considers it safe on skin up to 25% while advising against formulations that could be inhaled.

3. [3]
   Safety assessment of titanium dioxide (E171) as a food additive

   EFSA Journal (EFSA Panel on Food Additives and Flavourings) · 2021 · doi:10.2903/j.efsa.2021.6585

   A concern for genotoxicity of swallowed titanium dioxide could not be ruled out, so E 171 can no longer be considered safe as a food additive - a conclusion about oral intake that led to the EU food ban but not to any change in its cosmetic status.