Database/Abrasive/Calcium Carbonate
100% natural origin · ISO 16128

Is Calcium Carbonate natural?

Yes. Calcium and carbonate are both mineral-origin per ISO 16128, whether mined as limestone/chalk or precipitated from quarried lime.

INCI nameCalcium Carbonate
CAS471-34-1
FormulaCCaO3 · 100.09 Da
FunctionAbrasive · Buffering
FeedstockObtained by mining and grinding natural limestone, chalk…

How we scored it

Mineral salt (CaCO3); no organic synthesis. Ca and CO3 both mineral-origin. 100% natural origin, no fragment split needed.
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

Obtained by mining and grinding natural limestone, chalk or marble, or by precipitating calcium carbonate from quarried lime (calcium hydroxide) and CO2. Either route is mineral in origin.

In plain English

A finely ground mineral powder from limestone or chalk. Bulks out powders and pastes, acts as a mild abrasive, and buffers acids to keep toothpaste and masks at a stable pH.

Structure

2D structure of Calcium Carbonate

calcium carbonate

PubChem CID 10112 ↗

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 Carbonate. PubChem CID 10112. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CALCIUM CARBONATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CALCIUM CARBONATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CALCIUM%20CARBONATE