How we scored it
FeSO4 inorganic mineral salt; iron and sulfate are both mineral-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
Ferrous sulfate is produced from iron ore processing or as a byproduct of steel pickling with sulfuric acid, both mineral-origin processes.
In plain English
A mineral salt of iron used as an astringent in cosmetics. It comes from iron ore or is recovered from steel manufacturing, both mineral sources.
Structure
iron(2+) sulfate
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.
- 2Ferrous Sulfate. PubChem CID 24393. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3FERROUS SULFATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4FERROUS SULFATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=FERROUS%20SULFATE