What it is
Cellulose Acetate is made by acetylating cellulose, a natural plant polymer, to produce a versatile material used in films and powders. In skincare it can act as a film former and as a particulate that modifies texture and optical feel. In sunscreens it may help structure the formula or impart a soft-focus, smoothing appearance.
Safety & warnings
Considered inert and well tolerated on skin. As an insoluble polymer it is not associated with irritation or sensitization, and it is not a fragrance allergen.
Origin & sourcing
Semi-synthetic; produced by chemically modifying (acetylating) plant-derived cellulose such as wood pulp or cotton.
Questions everyone asks
Is cellulose acetate natural?
It is semi-synthetic, made by chemically modifying plant-derived cellulose, so it starts from a natural polymer that is then processed.
What does it do in a sunscreen?
It can act as a film former and texture agent, helping structure the formula or contribute a smoothing, soft-focus feel.