CI 77891[1] ●
TL;DR. This ingredient is primarily a white pigment and opacifier, adding coverage, brightness, and opacity to makeup, sunscreens, toothpaste, and personal care formulas. In some products, it also functions as a mineral UV filter when used and regulated as an active sunscreen ingredient.
What does CI 77891[1] do in a cosmetic formula?
This ingredient is primarily a white pigment and opacifier, adding coverage, brightness, and opacity to makeup, sunscreens, toothpaste, and personal care formulas. In some products, it also functions as a mineral UV filter when used and regulated as an active sunscreen ingredient.
Is CI 77891[1] clean?
Clean-beauty frameworks generally accept it in creams, lotions, and pressed or liquid makeup, but they often scrutinize inhalable powders and sprays because respiratory exposure changes the assessment. Particle size, surface coatings, and nano labeling are the main clean-standard checkpoints.
Is CI 77891[1] sustainable?
This material is mineral-derived, so it is not renewable and depends on mining and energy-intensive refining. It is inorganic and does not biodegrade, but it is generally considered environmentally stable rather than bioaccumulative in the way many persistent organic compounds are.
Is CI 77891[1] COSMOS-approved?
It is permitted under COSMOS as a mineral-derived pigment or opacifier, with nano-scale use subject to specific approval, labeling, and application conditions. From a Green Chemistry view, it scores well for stability and low reactivity, but less strongly on renewable sourcing and end-of-life biodegradability.
How does CI 77891[1] work chemically?
The molecule is an inorganic metal oxide with a high refractive index, commonly used in rutile or anatase crystal forms and often surface-treated with silica, alumina, or fatty acids to improve dispersion. Typical pigment use can range from below 1% to about 10%, while sunscreen-active use can be several percent depending on the formula and jurisdiction; it is insoluble, photostable, and highly dependent on particle size and dispersion quality.
Last updated 2026-05-13