Alumina has a Natural Origin Index (NOI) of 1.00 (scale 0–1) per ISO 16128. Alumina is aluminum oxide, a processed mineral from bauxite ore; entirely natural mineral origin. An NOI of 1.00 means 100% of its molecular mass is traceable to a natural, renewable source.

Is Alumina natural? NOI 1.00 — Is That Natural?

How we scored it

Al2O3, single mineral compound; all atoms are mineral in origin → 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

Alumina is refined from bauxite ore via the Bayer process into aluminum oxide. There is no petrochemical route; it is a mineral throughout.

In plain English

A mineral powder (aluminum oxide) refined from bauxite ore. Used in cosmetics as an abrasive, absorbent, bulking agent, and to make products opaque or prevent caking.

Structure

dialuminum;tris(oxygen(2-))

PubChem CID 9989226 ↗

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.
2Alumina. PubChem CID 9989226. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
3ALUMINA. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
4ALUMINA. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ALUMINA