Titanium Dioxide Ci No. 77891
Description
Inorganic UV filter (UVB-primary, limited UVA1); absorption edge ~350–360 nm provides strong UVB and UVA2 coverage with limited UVA1 protection above 360 nm; reflects, scatters, and absorbs UV; rutile polymorph preferred for sunscreens (lower photocatalytic activity than anatase); also used as opacifier and colorant (CI 77891)
Function
Properties
Regulatory Status
One of only two FDA GRAS sunscreen actives. Strong UVB and UVA2 protection but absorption edge at ~350–360 nm means limited UVA1 coverage — routinely combined with ZnO or avobenzone for full broad-spectrum compliance. Nano grades (20–100 nm) reduce white cast by shifting visible scattering to UV-range. Critical formulation specs: rutile crystal phase only (anatase more photocatalytic), alumina+silica coating (most effective ROS suppression), EU spray ban compliance and nano labeling. SCCS 2025 reassessment covering all cosmetic product types is a live regulatory risk to monitor — opinion due approximately September 2026. Genotoxicity for oral exposure routes (lip products, toothpaste) already established — avoid in those formats pending new opinion. Reef-safe. Globally approved.
FDA GRAS under OTC sunscreen monograph at up to 25%; one of only two GRAS UV filter actives. Primarily UVB-protective — combined with ZnO or avobenzone for broad-spectrum compliance. No nano-specific labeling or spray restriction in the US. IARC Group 2B applies to occupational inhalation, not dermal sunscreen use. Powder formats require additional safety data before GRAS confirmation.
Ratings
Identifiers
No registry identifiers available for this ingredient.