AKA: 128729-28-2, Imexine OAX, Hydroxypropyl bis(N-hydroxyethyl-p-phenylenediamine) hydrochloride, 2-Propanol, Tetrahydrochloride, 1, 3-Bis-((4-amino-phenyl)-(2-hydroxy-ethyl)-amino)-propan-2-ol, Hydrochloride (1:4)
FLAGS Allergen Warning
⚠️ PPD (Hair Dye)
WHAT IS IT? 1,4-Benzenediamine, N(4)-(2-hydroxyethyl)-N(1),N'(1)-[2-hydroxypropanediyl]-
WHAT DOES IT DO? Traditional Use
A synthetic hair dye precursor developed in the mid-20th century as part of modern oxidative hair coloring chemistry. Designed to replace older, less stable natural dyes and provide consistent color results.
IS IT CLEAN? Regulatory Status
JAPAN ✔ permitted
IS IT FOR ME? Pregnancy & Breastfeeding Safe
Caution
CAN I TRUST THIS? The paper trail
🔬 Peer-reviewed none on file
🛡️ Safety-assessed 3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR