What it is
Poly(C30-45 Olefin) is a high-molecular-weight synthetic polymer derived from the polymerization of alpha-olefin monomers with carbon chain lengths ranging from 30 to 45 atoms. It belongs to the polyene/polyolefin class of cosmetic ingredients. Its primary role in formulations is as a film former: it deposits a thin, continuous coating on the skin surface that can improve texture and help retain moisture. Due to its large molecular size, dermal penetration is minimal, which contributes to its favorable safety profile. It is typically used in color cosmetics, sunscreens, and skin care products. The ingredient is not used for fragrance or flavor purposes and is considered synthetically derived with no natural occurrence.
Safety & warnings
The CIR Expert Panel concluded polyene-group ingredients, including Poly(C30-45 Olefin), are safe in cosmetics at current use levels. The high molecular weight significantly limits dermal penetration. No notable allergenicity, irritancy, or comedogenicity concerns have been identified in the available literature. No hazard classifications are assigned.
Origin & sourcing
Synthetic. Produced by polymerization of alpha-olefin monomers with carbon chain lengths in the C30–C45 range, typically via Ziegler-Natta or metallocene catalysis. The resulting polymer is a waxy to semi-solid material with film-forming and emollient properties.
History
Poly(C30-45 Olefin) was reviewed as part of the Cosmetic Ingredient Review (CIR) Expert Panel's safety assessment of the polyene group, published in 2015 and updated in 2020. The Panel concluded that the group of polyene ingredients, including simple polyolefins used as film formers and viscosity-increasing agents, is safe as used in cosmetics. The EU CosIng database lists the ingredient with film-forming function.
Questions everyone asks
What does Poly(C30-45 Olefin) do in a sunscreen or cosmetic formula?
It acts as a film former, depositing a thin, smooth coating on the skin surface. This can improve the texture and spreadability of a formula and help the product adhere evenly to the skin.
Is Poly(C30-45 Olefin) safe for use in cosmetics?
Yes. The CIR Expert Panel reviewed polyene-group polymers and concluded they are safe in cosmetics as currently used. Its high molecular weight means it stays largely on the skin surface and does not penetrate significantly.
Is this ingredient natural or synthetic?
It is synthetic, produced by polymerizing long-chain alpha-olefins (C30–C45) through industrial chemical processes such as Ziegler-Natta or metallocene catalysis.
What product types typically contain Poly(C30-45 Olefin)?
It appears in color cosmetics, sunscreens, and skin care products where a film-forming or skin-conditioning effect is desired.