How we scored it
Mineral hydroxide; calcium metal ion and hydroxide group are both explicitly natural-origin.
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
Produced by hydrating quicklime (calcium oxide), itself derived from mined limestone. A basic inorganic mineral used to adjust pH.
In plain English
A mineral-derived pH adjuster made from limestone, also known as slaked lime. Used in small amounts to neutralize acidic ingredients in a formula.
Structure
calcium dihydroxide
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.
- 2Calcium Hydroxide. PubChem CID 6093208. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3CALCIUM HYDROXIDE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4CALCIUM HYDROXIDE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CALCIUM%20HYDROXIDE