How we scored it
Mg2+ (metal ion, mineral) + peroxide O2^2- (elemental oxygen); treated as mineral-origin oxidising salt, same convention as magnesium oxide → 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
Manufactured by reacting a magnesium salt or magnesium oxide with hydrogen peroxide. Both magnesium and oxygen are mineral/elemental in origin, so the compound is classed as natural origin.
In plain English
An inorganic magnesium compound made by reacting a magnesium salt with hydrogen peroxide. Used as an oxidising agent in some cosmetic formulations.
CosIng definition: Magnesium dioxide / magnesium peroxide
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.
- 2MAGNESIUM PEROXIDE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3MAGNESIUM PEROXIDE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=MAGNESIUM%20PEROXIDE