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

Is Calcium Citrate natural?

Yes. Calcium is a natural mineral ion and citrate is a fermentation product of plant sugars.

INCI nameCalcium Citrate
CAS813-94-5
FormulaC12H10Ca3O14 · 498.4 Da
FunctionBuffering
FeedstockMade by neutralising fermentation-derived citric acid with a…

How we scored it

3x Ca2+ (mineral ion, natural) + 2x citrate C6H5O7 (fermentation) = 498.4/498.4 = 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 neutralising fermentation-derived citric acid with a calcium base. No significant alternative route exists.

In plain English

A calcium salt of citric acid, used to buffer pH. The calcium is mineral and the citric acid comes from fermentation of plant sugars.

Structure

2D structure of Calcium Citrate

tricalcium bis(2-hydroxypropane-1,2,3-tricarboxylate)

PubChem CID 13136 ↗

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 Citrate. PubChem CID 13136. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3CALCIUM CITRATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4CALCIUM CITRATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CALCIUM%20CITRATE