4-Nitro-o-Phenylenediamine

AKA “99-56-9, 4-Nitro-1, 2-phenylenediamine, 1, 2-Diamino-4-nitrobenzene, 2-Amino-4-nitroaniline, 2-diaminobenzene, p-Nitro-o-phenylenediamine, 3, 4-Diaminonitrobenzene, 2-Benzenediamine, 4-nitro-, 2-benzenediamine”

Ingredient

Ingredient Facts

4-Nitro-o-Phenylenediamine

AKA: 99-56-9, 4-Nitro-1, 2-phenylenediamine, 1, 2-Diamino-4-nitrobenzene, 2-Amino-4-nitroaniline, 2-diaminobenzene, P-Nitro-o-phenylenediamine, 3, 4-Diaminonitrobenzene, 2-Benzenediamine, 2-benzenediamine

Ingredient · Hair Dyeing · EWG: 4

Synthetic

Safety Concern

Not Clean

4-nitro-o-phenylenediamine (CI 76020)

Solubility less than 1 mg/mL at 68.9 °F (NTP, 1992)

Formula

C6H7N3O2

Mol. Weight

153.14

CAS #

99-56-9

Form

Liquid

State

4-nitro-o-phenylenediamine appears as dark red needles or red solid. (NTP, 1992)

See origin →

Functions

Hair Dyeing

Reduces Inflammation

Antioxidant Protection

Fights Bacteria

Colors Hair

Traditional Use

Synthetic azo dye developed in the early 20th century for use as a hair colorant. Part of the family of coal tar-derived compounds that revolutionized permanent hair color formulation.