2-Amino-4-Nitrophenol

AKA “2-Hydroxy-5-nitroaniline, 4-Nitro-2-aminophenol, Phenol, p-Nitro-o-aminophenol, Rodol 42, 4-Nitro-2-aminofenol, 1-Amino-2-hydroxy-5-nitrobenzene, 1-Hydroxy-2-amino-4-nitrobenzene”

Synthetic

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Ingredient Facts

2-Amino-4-Nitrophenol

AKA: 2-Hydroxy-5-nitroaniline, 4-Nitro-2-aminophenol, P-Nitro-o-aminophenol, Rodol 42, 4-Nitro-2-aminofenol, 1-Amino-2-hydroxy-5-nitrobenzene, 1-Hydroxy-2-amino-4-nitrobenzene

Synthetic · Hair Dyeing · EWG: 4

Plant-Derived

Synthetic

Clean

A synthetic colorant that helps create and stabilize hair dye shades, working as a key component in permanent hair color formulas.

Solubility less than 1 mg/mL at 68 °F (NTP, 1992)

Formula

C6H6N2O3

Mol. Weight

154.12

CAS #

99-57-0

Form

Powder

Plant-Derived

Synthetic. Synthesized from 4-nitroaniline, an aromatic amine compound derived from petroleum-based chemical precursors. Produced through selective reduction and oxidation reactions to introduce the amino and nitro functional groups.

Function

Hair Dyeing

Benefits

Antioxidant Protection

Reduces Inflammation

Fights Bacteria

Colors Hair

Traditional Use

A synthetic aromatic compound developed as a hair dye precursor in oxidative coloring systems. It was created in the 20th century as part of the shift from natural plant dyes to synthetic alternatives.