How we scored it
Cu2O: Cu 127.1 Da + O 16.0 Da, all mineral (metal and oxide); 143.1 / 143.1 = 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
Copper metal or cuprite ore is oxidised or reduced under controlled conditions to give cuprous oxide. No petrochemical route exists.
In plain English
A copper oxide compound (red-orange powder) listed for skin conditioning. It is an inorganic copper salt, not a plant- or animal-derived ingredient.
CosIng definition: Cuprous Oxide is the inorganic oxide. See "Regulatory and Ingredient Use Information," for Colorants in Volume 1, Introduction, Part A.
Structure
bis(copper(1+));oxygen(2-)
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.
- 2Cuprous Oxide. PubChem CID 10313194. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3CUPROUS OXIDE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4CUPROUS OXIDE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CUPROUS%20OXIDE