Question 1

What is Titanium Dioxide/ Ci 77891 and what does it do in sunscreen?

Accepted Answer

Titanium Dioxide/ Ci 77891 is a mineral that works as both a UV filter and a white pigment. As a filter it scatters and absorbs light at the skin's surface, mostly in the UVB and short-UVA range. The Ci 77891 part is its color index code, the same naming used when it acts purely as a white colorant in tinted and makeup-style products.

Question 2

Is Titanium Dioxide/ Ci 77891 a UV filter or a colorant?

Accepted Answer

It can be both, depending on the form and the formula. The same mineral scatters UV light, which makes it a sun filter, and it is also a bright white pigment, which is why it carries the Ci 77891 color index code on the label. In a sunscreen it is usually there for protection, but in tinted or foundation-style products it may also be helping with opacity and shade.

Question 3

Is Titanium Dioxide/ Ci 77891 safe?

Accepted Answer

Yes. Titanium dioxide is one of the most widely used and best-tolerated mineral sun filters, common in sensitive-skin, baby and children's formulas. It sits on the skin's surface rather than soaking in, and is considered non-irritating for most people. The main trade-off is cosmetic, since it can leave a white cast depending on the particle size used.

Question 4

Does Titanium Dioxide/ Ci 77891 clog pores?

Accepted Answer

Generally no. It is an inert mineral powder rather than a heavy oil or wax, so on its own it is not a notable pore-clogging ingredient. It is widely used in formulas aimed at sensitive and blemish-prone skin. If a mineral sunscreen feels heavy or causes breakouts, the richer emollients and waxes used to make it spreadable are the more likely cause.

Question 5

Why does Titanium Dioxide/ Ci 77891 leave a white cast?

Accepted Answer

Because it is a bright white mineral that works partly by scattering light, it can leave a pale film on the skin, more visible on deeper skin tones. How strong the cast is depends on the particle size and how the formula is built. Finer, well-dispersed grades and tinted versions reduce it, though a mineral sunscreen will rarely be completely invisible.

Question 6

Is Titanium Dioxide/ Ci 77891 natural?

Accepted Answer

It is mineral-derived but processed. Titanium dioxide comes from naturally occurring ores, which are then purified and milled to a controlled, cosmetic-grade powder, often surface-coated to improve feel and dispersion. So it is mineral in origin rather than a lab-built organic molecule, but it is not used in its raw natural state.

Titanium Dioxide/ Ci 77891

What Titanium Dioxide/ Ci 77891 is & what it does