How we scored it
Linolenic acid (C18 triunsaturated, plant oil) acyl fragment + ethanol (fermentation) fragment; condensation water excluded → 306.5/306.5 = 1.0.
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
Made by esterifying linolenic acid, a polyunsaturated fatty acid from plant oils, with ethanol, which is predominantly fermentation-derived globally. A minority petrochemical ethanol route exists.
In plain English
An ester formed from linolenic acid, a polyunsaturated fatty acid found in plant oils such as flaxseed, combined with ethanol. Used as a skin-conditioning emollient in cosmetic formulations.
Structure
ethyl (9Z,12Z,15Z)-octadeca-9,12,15-trienoate
References
- 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.
- 2Ethyl Linolenate. PubChem CID 5367460. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3ETHYL LINOLENATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4ETHYL LINOLENATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ETHYL%20LINOLENATE