Database/Absorbent/Magnesium Oxide
100% natural origin · ISO 16128

Is Magnesium Oxide natural?

Yes. Magnesium oxide is a simple mineral, analogous to zinc oxide and titanium dioxide.

INCI nameMagnesium Oxide
CAS1309-48-4
FormulaMgO · 40.305 Da
FunctionAbsorbent · Buffering
FeedstockDerived from mined magnesite/brucite mineral or seawater magnesium,…

How we scored it

Mineral oxide; Mg is a natural-origin metal ion = 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

Derived from mined magnesite/brucite mineral or seawater magnesium, calcined to the oxide. A mineral-origin ingredient with no petrochemical route.

In plain English

A mineral ingredient used to absorb moisture or oil, buffer acidity, and opacify formulas. Comes from mined magnesium mineral sources.

Structure

2D structure of Magnesium Oxide

oxomagnesium

PubChem CID 14792 ↗

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. 2Magnesium Oxide. PubChem CID 14792. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3MAGNESIUM OXIDE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4MAGNESIUM OXIDE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=MAGNESIUM%20OXIDE