Database/Buffering/Calcium Oxide
100% natural origin · ISO 16128

Is Calcium Oxide natural?

Yes. Calcium oxide is produced by calcining natural limestone, a mineral feedstock.

INCI nameCalcium Oxide
CAS1305-78-8
FormulaCaO · 56.08 Da
FunctionBuffering
FeedstockMade by calcining (heating) natural limestone (calcium carbonate)…

How we scored it

CaO is a simple mineral (quicklime); calcium and oxide are both natural-origin mineral fragments. 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 calcining (heating) natural limestone (calcium carbonate) to drive off carbon dioxide. It is used in small amounts to adjust formula pH.

In plain English

A mineral (lime) used in small amounts to adjust the acidity of a formula. Derived from natural limestone.

Structure

2D structure of Calcium Oxide

oxocalcium

PubChem CID 14778 ↗

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. 2Calcium Oxide. PubChem CID 14778. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CALCIUM OXIDE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CALCIUM OXIDE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CALCIUM%20OXIDE