Titanium Dioxide
A mineral UV filter (and white pigment) that pairs with zinc oxide for gentle, low-allergy sun protection
INCITitanium Dioxide
- Category
- Sunscreen / UV Filter
- Risk level
- low
- What it covers
- UVB + short UVA (~290–350 nm) — strong on UVB, weaker on deep UVA than zinc oxide
- Usually paired with zinc
- Quality mineral sunscreens combine TiO2 + ZnO for full broad-spectrum coverage
- Dual identity
- Also the main white pigment (CI 77891) in foundations and concealers
- Tolerability
- One of the least irritating, lowest-allergy filters; pregnancy- and infant-safe
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This ingredient may appear under any of these names:
Commonly found in
Possible reactions
- Extremely rare allergic reactions
- White cast on deeper skin tones
- Can clog pores in heavy occlusive bases
- No sun sensitivity
- Safe in pregnancy and for children
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What is titanium dioxide?
Titanium dioxide (TiO2) is a bright white mineral with two jobs in cosmetics: a UV filter in sunscreens and a white pigment (listed as CI 77891) in foundations, concealers, and tinted products. As a sun filter it works like zinc oxide — sitting on the surface and scattering, reflecting, and absorbing UV. It's been used in sunscreens since the 1950s and is approved worldwide up to 25%.
Its strength is UVB and short UVA (≈290–350 nm); its limitation is weaker coverage of deep UVA1 (340–400 nm). That's why quality mineral sunscreens almost always pair it with zinc oxide — together they deliver complete broad-spectrum protection.
Why it's so well tolerated
Titanium dioxide is among the least irritating ingredients known: decades of patch-test data show virtually no contact dermatitis, and it's rated safe up to 25% by the FDA, EU, and CIR.
- Nano vs non-nano — micronised TiO2 reduces white cast and does not penetrate intact skin.
- Inhalation — the one caution is loose powder/spray; creams and lotions are fine.
- White cast — whiter than zinc, so it casts more on deeper tones; tinted (iron-oxide) versions fix this.
- Pregnancy/babies — a standard conservative choice.
How to use it well
- Choose TiO2 + ZnO blends — pure TiO2 lacks deep-UVA coverage.
- Apply generously — two finger-lengths for face and neck.
- Reapply every 2–3 hours, especially with sweat/humidity.
- Tinted for deeper skin — cancels white cast, adds visible-light protection.
- Skip powder sunscreens as your only protection — fine for touch-ups, not a base.
Alternatives
- Broader UVA: zinc oxide alone, or Tinosorb S/M blends (EU/Asia).
- Cosmetically lighter: modern chemical filters (Tinosorb, Uvinul).
- Makeup with SPF: tinted moisturisers/BB creams with TiO2 give a baseline.
The bottom line
Titanium dioxide is a gentle, ultra-low-allergy mineral filter best teamed with zinc oxide for full coverage — and the same mineral quietly provides the white base of much of your makeup. For sensitive, pregnant, or infant skin, a TiO2 + ZnO sunscreen is a safe default.
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