4-Methoxy-m-Phenylenediamine-HCI

4-Methoxy-m-Phenylenediamine-HCI molecular structure
molecular structure · PubChem
AKA: 4-Methoxy-m-Phenylenediamine HCl
Allergen Warning
⚠️ PPD (Hair Dye)
Synthetic
Not Clean
4-Methoxy-m-Phenylenediamine-HCI is a cosmetic ingredient. Assessed as safe by the CIR.
Form
Liquid
Functions
Hair Dyeing
Traditional Use
A synthetic hair dye precursor developed in the early-to-mid 20th century. The hydrochloride salt form was created to enhance stability and solubility in aqueous hair dye formulations.
EWG
4
CIR
Safe as used
Pregnancy
No
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory0 listings
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR