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Titanium Dioxide

Also known as: TiO2, Titania, CI 77891

A mineral UV filter and white pigment whose safety context changes sharply between intact-skin use and inhalable powder.

White mineral specimen, fine powder, and an opaque white cosmetic swatch
Editorial illustration

Titanium dioxide is an inorganic mineral used as a UV filter in sunscreen and as a white pigment or opacifier. FDA's sunscreen framework permits it up to 25%, and current evidence indicates little penetration through intact skin. That topical assessment should not be generalized to inhalation of loose or sprayable particles.2, 3, 4

  • Mineral sunscreen active and white pigment1, 2
  • Reflects and absorbs ultraviolet radiation1, 2
  • Permitted in U.S. OTC sunscreen up to 25%1, 2
  • Inhalation exposure is distinct from cream use1, 2

What is Titanium Dioxide?

Titanium dioxide occurs in mineral forms such as rutile and anatase. Cosmetic particles are processed for optical performance and may be coated to improve dispersion and reduce unwanted reactivity.1, 2

Where it comes from

Natural sources

  • Titanium-bearing mineral ores

How it's made

Cosmetic and sunscreen grades are purified, milled, crystal-controlled, and often surface-coated.

What it does in products

  • Broad-spectrum mineral UV filter
  • White pigment
  • Opacifier

Benefits

Ultraviolet protection

strong evidence

Properly formulated titanium dioxide contributes UVB and UVA protection and is one of the mineral actives in U.S. sunscreens.2, 3

FDA monograph and safety review support topical sunscreen use within specified conditions; finished-product SPF still requires testing.

Low intact-skin penetration

moderate evidence

Human safety reviews find dermal penetration of nano and pigmentary titanium dioxide is very limited through intact skin.4, 3

Damaged skin, particle coating, and aerosol exposure are different questions.

Universal protection from visible light

insufficient evidence

Ordinary un-tinted titanium dioxide does not guarantee meaningful visible-light protection for hyperpigmentation.2

Visible-light performance depends on particle size, pigment dispersion, tint, and iron oxides in the finished product.

Evidence scope and limitations

Topical sunscreen and pigment use on skin are separated from occupational, food, and inhalation exposure.

  • Finished-product UV performance cannot be inferred from ingredient percentage alone.
  • Particle coating and aerosol behavior vary by product.

Evidence last checked: 2026-09-28

Side effects & safety

White cast (common)Optical appearance varies by particle size and tint.
Dry or heavy feel (varies)Usually a vehicle issue.
Inhalation concern (varies)Loose powders and sprays create a different exposure route from creams.

Safety considerations

  • No drug interactions expected from topical sunscreen use
  • Not for: Deliberate inhalation of loose powder or aerosol
  • Not for: Relying on raw pigment instead of a tested sunscreen
3, 4

Amounts studied & product use

These figures describe research or common product use, not a personal dose or treatment recommendation.

In skincare studies and products

FDA OTC sunscreen monograph M020 lists titanium dioxide up to 25%. The protective value comes from a tested finished product, not from mixing pigment into skincare at home.

2

Regulatory status

  • Listed in U.S. OTC sunscreen monograph M020 up to 25%; also used as a cosmetic colorant and opacifier under applicable rules.
  • INCI name on cosmetic labels: Titanium Dioxide.
2, 3

Nano is a size description, not a complete risk conclusion

Particle size affects transparency and UV behavior. Safety evaluation also considers coating, aggregation, route, dose, and whether particles are inhaled or applied in a cream. A single nano label cannot answer all of those questions.

4, 3

Frequently asked questions

Is titanium dioxide a chemical or mineral sunscreen?

It is commonly called a mineral or inorganic UV filter; all ingredients are chemicals in the broader scientific sense.2, 3, 4

Does it enter the bloodstream?

Evidence indicates very little penetration through intact skin, unlike several soluble organic filters studied under maximal-use conditions.2, 3, 4

Can I make sunscreen with titanium dioxide powder?

No. Uniform dispersion and verified SPF/UVA protection require a tested finished formula.2, 3, 4

The bottom line

Titanium dioxide has strong topical sunscreen utility; aerosol and DIY powder exposure should not borrow the safety conclusions of tested creams.

References

  1. Titanium dioxide: compound summary. PubChem, National Library of Medicine (2026) · ingredient monograph · CID 26042
  2. OTC Monograph M020: Sunscreen Drug Products for Over-the-Counter Human Use. U.S. Food and Drug Administration (2021) · government guidance · OTC Monograph M020
  3. Questions and Answers: FDA regulatory actions on over-the-counter sunscreen. U.S. Food and Drug Administration (2026) · government guidance
  4. Human safety review of nano titanium dioxide and zinc oxide. Photochemical & Photobiological Sciences (2010) · other · PMID 20354643

Revision history

  1. Initial publication with claim-level citations, formulation limits, safety context, and editorial evidence review.