CI77891 ●
TL;DR. This ingredient is primarily a white colorant and opacifier, giving formulas coverage, brightness, and opacity. In sunscreen formats, specific grades can also function as a mineral UV filter.
What does CI77891 do in a cosmetic formula?
This ingredient is primarily a white colorant and opacifier, giving formulas coverage, brightness, and opacity. In sunscreen formats, specific grades can also function as a mineral UV filter.
Is CI77891 clean?
This ingredient is broadly accepted in many clean-beauty standards for rinse-off and leave-on products, with most scrutiny focused on inhalable powders or sprays and nano-scale grades. It is generally low-irritation on skin, but particle size, coating, and product format matter.
Is CI77891 sustainable?
This material is mineral-derived, so sourcing depends on mining and refining rather than renewable agriculture. It is inorganic and not biodegradable in the usual sense, but it is relatively inert and environmental concerns are mainly tied to extraction, energy use, and particle release.
Is CI77891 COSMOS-approved?
It is permitted under COSMOS-natural and COSMOS-organic frameworks when it meets mineral-origin and processing requirements, with nano and product-format limitations depending on use. From a Green Chemistry view, it scores well for stability and low skin reactivity, but less well on renewable feedstock and end-of-life biodegradation.
How does CI77891 work chemically?
The molecule is an insoluble inorganic oxide used as a finely dispersed particulate, often surface-treated to improve dispersion, reduce photocatalytic activity, and improve skin feel. Typical color and opacity use levels can sit below 1% to several percent, while sunscreen-active systems may use much higher levels, commonly up to regulated regional limits around 25%.
Last updated 2026-05-13