How we scored it
Iron oxide mineral pigment, no organic synthesis = 1.00
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 purifying and micronising natural or synthetically-precipitated iron oxide; ISO 16128 classes mineral iron oxides as natural origin regardless of precipitation method.
In plain English
A mineral-based red-brown pigment made of iron oxide, used to add colour to makeup and skincare products. It occurs naturally as a mineral form and is purified for cosmetic use.
CosIng definition: CI 77491 is classed chemically as an inorganic colour. It consists chiefly of ferric oxide that conforms to the formula:
Structure
oxo(oxoferriooxy)iron
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.
- 2CI 77491. PubChem CID 518696. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3CI 77491. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4CI 77491. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2077491