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Quick answer: Both score equally on our risk model. m-Phenylenediamine is restricted in the EU and allowed in the US; p-Phenylenediamine is restricted in the EU and allowed in the US.
| Property | m-Phenylenediamine | p-Phenylenediamine |
|---|---|---|
| EU status | Restricted | Restricted |
| US status | Allowed | Allowed |
| Risk level | high | high |
| Banned in | — | — |
| Restricted in | European Union | European Union |
| Category | cmr | cmr |
| Where it hides | hair dye | permanent hair dye, black henna tattoos |
m-Phenylenediamine (m-Phenylenediamine) is a hair-dye intermediate.
p-Phenylenediamine is a primary intermediate in permanent hair dye.
m-Phenylenediamine: A possible carcinogen and strong sensitizer; restricted in the EU.
p-Phenylenediamine: A potent allergen and sensitizer. Strictly concentration-limited in the EU; less tightly controlled in the US.
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