How we scored it
Mineral iron oxide (black, ferrous-ferric type); pigment mass entirely mineral → 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
Manufactured by controlled oxidation/precipitation of iron salts to black iron oxide. Mined natural magnetite is an alternative, but synthesis dominates cosmetic-grade supply.
In plain English
A black iron oxide pigment used to colour products like mascara and eyeliner. It is produced by precipitating iron salts into a mineral-based colourant.
CosIng definition: CI 77499 is classed chemically as an inorganic colour. It consists chiefly of ferrous-ferric oxide (see also INCI:Iron Oxides)
Structure
iron(2+);bis(iron(3+));tetrakis(oxygen(2-))
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 77499. PubChem CID 6432052. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3CI 77499. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4CI 77499. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=CI%2077499