Database/Film Forming/Polyester-8
Mostly petroleum · ISO 16128

Is Polyester-8 natural?

Mostly not. The polyester backbone is fully petrochemical; only the minor octyldodecanol endcap option contributes a small natural fraction.

INCI namePolyester-8
FunctionFilm Forming · Skin Conditioning
FeedstockPolycondensation of petrochemical adipic acid and neopentyl glycol,…

How we scored it

Backbone of adipic acid + neopentyl glycol (both petrochemical, 0) end-capped with octyldodecanol (natural fatty alcohol) or a synthetic cyanodiphenyl group; endcap is a minor mass fraction, so overall approx 0.08.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Polycondensation of petrochemical adipic acid and neopentyl glycol, end-capped with either oleochemical octyldodecanol or a synthetic UV-absorbing cyanodiphenylpropenoyl group.

In plain English

A synthetic film-forming ingredient used in nail and skin products. It is made from petrochemical building blocks capped with either a fatty alcohol or a lab-made light-absorbing group.

CosIng definition: Polyester-8 is a copolymer of Adipic Acid and Neopentyl Glycol end-capped with either Octyldodecanol or a cyanodiphenylpropenoyl group

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References

  1. 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
  2. 2POLYESTER-8. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3POLYESTER-8. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=POLYESTER-8