Cyclopentasiloxane vs Homosalate: which is worse?
Quick answer: Both score equally on our risk model. Cyclopentasiloxane is restricted in the EU and allowed in the US; Homosalate is restricted in the EU and allowed in the US.
| Property | Cyclopentasiloxane | Homosalate |
|---|---|---|
| EU status | Restricted | Restricted |
| US status | Allowed | Allowed |
| Risk level | medium | medium |
| Banned in | — | — |
| Restricted in | European Union | European Union |
| Category | endocrine disruptor | uv filter |
| Where it hides | hair serum, primer, deodorant | sunscreen, SPF moisturizer, SPF foundation |
What is Cyclopentasiloxane?
Cyclopentasiloxane is a volatile silicone (D5) used for smooth, silky texture.
What is Homosalate?
Homosalate is an organic UV filter that absorbs UVB radiation.
Documented risks
Cyclopentasiloxane: Persistent and bioaccumulative; the EU restricts D5 in wash-off products over environmental and endocrine concerns. The US has no restriction.
Homosalate: A suspected endocrine disruptor; the EU limits it to 7.34% in face products (2025), well below typical US concentrations.
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