N-Phenyl-p-Phenylenediamine HCl

N-Phenyl-p-Phenylenediamine HCl molecular structure
molecular structure · PubChem
AKA: 4-Aminodiphenylamine hydrochloride, 1, 4-Benzenediamine, Monohydrochloride, Eucanine Grey B, Zoba Grey BR, N-Phenyl-p-phenylenediamine hydrochloride, Fourrine Grey B, P-Aminodiphenylamine HCl, Durafur Grey BN, Fouramine Grey A, Futramine Grey B
Allergen Warning
⚠️ PPD (Hair Dye)
Synthetic
Not Clean
N-Phenylbenzene-p-diamine monohydrochloride (CI 76085)
Formula
C12H13ClN2
Mol. Weight
220.70
CAS #
2198-59-6, 56426-15-4
Form
Liquid
Functions
Hair Dyeing
Boosts Collagen
Fights Acne
Colors hair
Traditional Use
Hydrochloride salt form of a synthetic hair dye intermediate created in the 20th century. Used in permanent hair color formulations for improved stability.
EWG
4
CIR
Safe as used
Pregnancy
No
CIR Safety Findings
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 →
⚖️Regulatory1 listing →
🛡️Safety-assessed0 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR