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Quick answer: Phenol carries the heavier risk profile. p-Phenylenediamine is restricted in the EU and allowed in the US; Phenol is banned in the EU and allowed in the US.
| Property | p-Phenylenediamine | Phenol |
|---|---|---|
| EU status | Restricted | Banned |
| US status | Allowed | Allowed |
| Risk level | high | high |
| Banned in | — | European Union |
| Restricted in | European Union | — |
| Category | cmr | cmr |
| Where it hides | permanent hair dye, black henna tattoos | chemical peels, medicated lotions |
p-Phenylenediamine is a primary intermediate in permanent hair dye.
Phenol (Phenol) is a corrosive antiseptic and peeling agent.
p-Phenylenediamine: A potent allergen and sensitizer. Strictly concentration-limited in the EU; less tightly controlled in the US.
Phenol: Toxic and corrosive; banned in EU cosmetics.
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