The ingredient, explained
Ci 77492
A preliminary conference study examined composites containing yellow iron oxideCI77492.
Ingredient guide
What it is and what it does
Iron oxide
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Cosmetic colorant
- Adds colour to a product or the surface where it is applied.
Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗
Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.
A closer look
What the research shows
Preliminary conference report
The composite materials absorbed visible and ultraviolet light in optical tests.
What this does not tell us
Other oxides and titanium dioxide were present; there is no isolatedCI77492or human efficacy result.
Sources for this summary. DOI 10.1111/ics.12921 ↗
Research review checked Oct 1, 2026
Read exact local candidate abstracts first; select identity-relevant papers; targeted primary PubMed/publisher searches. This is not an exhaustive systematic review.
Ingredient research is not proof that a product containing this ingredient works.
Read the 1 selected study
Preliminary conference report
Innovative multifunctional mineral filters: protection from ultraviolet, visible and infrared radiation and colour ↗
International Journal of Cosmetic Science · 2023
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
Registry identity
Iron oxide
- INCI name on ingredient lists
- CI 77492
- CAS registry number
- 51274-00-1, 1345-27-3, 20344-49-4, 52357-70-7
- EC number
- 257-098-5 / 215-722-3 / 215-570-8 / 257-670-1
Sources for this ingredient record
- EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗ · ODbL 1.0 (Open Beauty Facts database) · Recorded Aug 8, 2026