Ingredient guide
What it is and what it does
About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗
- Abrasive
- Provides mechanical surface cleaning or polishing.
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
Catalogue CAS 7440-21-3 is elemental silicon. Local trials study silicone polymers, a different material. Targeted primary search found silica and oxidized/functionalized silicon carriers; no exact unmodified elemental-silicon skin intervention or safety source was established in this bounded search.
Research review checked Oct 1, 2026
Review supplied candidate titles and available abstracts selectively for exact identity; targeted primary PubMed/publisher searches. This is not an exhaustive systematic review.
Ingredient research is not proof that a product containing this ingredient works.
Follow the formula
Products containing this ingredient
From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.
Names and identifiers
- INCI name on ingredient lists
- SILICON
- CAS registry number
- 7440-21-3
- EC number
- 231-130-8 I
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