How we scored it
Ascorbic acid (natural) tetraesterified with isopalmitic acid (C16 branched fatty acid, oleochemical) → total/total = 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 ascorbic acid, from fermented glucose, with isopalmitic acid, a branched C16 fatty acid typically produced from natural fatty-acid feedstocks. A petrochemical route to isopalmitic acid also exists.
In plain English
An oil-soluble vitamin C ester used to condition skin and help protect against oxidative stress. It is made by combining ascorbic acid with isopalmitic acid, a branched fatty acid, in a four-fold ester.
CosIng definition: Ascorbyl Tetraisopalmitate is the tetraester of Ascorbic Acid and isopalmitic acid. It conforms generally to the formula:
Structure
[(2S)-2-[(2R)-3,4-bis(2-hexyldecanoyloxy)-5-oxo-2H-furan-2-yl]-2-(2-hexyldecanoyloxy)ethyl] 2-hexyldecanoate
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.
- 2Ascorbyl Tetraisopalmitate. PubChem CID 10260680. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3ASCORBYL TETRAISOPALMITATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4ASCORBYL TETRAISOPALMITATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ASCORBYL%20TETRAISOPALMITATE