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Quick answer: Acid Black 1 carries the heavier risk profile. Acid Black 1 is restricted in the EU and allowed in the US; Disperse Blue 1 is banned in the EU and allowed in the US.
| Property | Acid Black 1 | Disperse Blue 1 |
|---|---|---|
| EU status | Restricted | Banned |
| US status | Allowed | Allowed |
| Risk level | low | medium |
| Banned in | — | European Union |
| Restricted in | European Union | — |
| Category | dye | dye |
| Where it hides | hair dye | hair dye, temporary tattoos |
Acid Black 1 (Acid Black 1) is an azo hair dye.
Disperse Blue 1 (Disperse Blue 1) is an anthraquinone dye.
Acid Black 1: Concentration-restricted in the EU.
Disperse Blue 1: A possible carcinogen; banned in EU cosmetics.
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