2-Nitro-p-Phenylenediamine

2-Nitro-p-Phenylenediamine molecular structure
molecular structure · PubChem
AKA: 2-Nitro-4-phenylenediamine, 5307-14-2, 2-nitrobenzene-1, 4-diamine, 2-Nitro-1, 4-phenylenediamine, 1, 4-Diamino-2-nitrobenzene, 4-Benzenediamine, 5-Diaminonitrobenzene, 4-benzenediamine
Allergen Warning
⚠️ PPD (Hair Dye)
Synthetic
Not Clean
2-Nitro-p-phenylenediamine (CI 76070)
Solubility less than 1 mg/mL at 72 °F (NTP, 1992)
Formula
C6H7N3O2
Mol. Weight
153.14
CAS #
5307-14-2
Form
Liquid
State
Almost black needles with dark-green luster or black powder. (NTP, 1992)
Functions
Hair Dyeing
Antioxidant Protection
Reduces Inflammation
Fights Bacteria
Colors Hair
Traditional Use
A synthetic hair dye ingredient developed in the early-to-mid 20th century. Created to replace earlier, less stable dye precursors and produce permanent hair color.
EWG
6
CIR
Safe as used
Pregnancy
No
CIR Safety Findings
Not a Sensitizer
ewg-6
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU✔ permitted
JAPAN✔ permitted
CANADA✔ permitted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR