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Quick answer: Butylated triphenyl phosphate carries the heavier risk profile. Butylated triphenyl phosphate is restricted in the EU and allowed in the US; Cyclopentasiloxane is restricted in the EU and allowed in the US.
| Property | Butylated triphenyl phosphate | Cyclopentasiloxane |
|---|---|---|
| EU status | Restricted | Restricted |
| US status | Allowed | Allowed |
| Risk level | low | medium |
| Banned in | — | — |
| Restricted in | European Union | European Union |
| Category | endocrine disruptor | endocrine disruptor |
| Where it hides | nail polish | hair serum, primer, deodorant |
Butylated triphenyl phosphate (BTPP) is a plasticizer.
Cyclopentasiloxane is a volatile silicone (D5) used for smooth, silky texture.
Butylated triphenyl phosphate: An endocrine disruptor restricted in the EU.
Cyclopentasiloxane: Persistent and bioaccumulative; the EU restricts D5 in wash-off products over environmental and endocrine concerns. The US has no restriction.
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