Hydroxypropyl bis (N-hydroxyethyl-p-phenylenediamine) hcl
AKA “128729-28-2, Imexine OAX, Hydroxypropyl bis(N-hydroxyethyl-p-phenylenediamine) hydrochloride, UNII-0K832J58E7, 0K832J58E7, DTXSID30155976, 2-Propanol, 1, 3-bis((4-aminophenyl)(2-hydroxyethyl)amino)-, tetrahydrochloride, 3-Bis-((4-amino-phenyl)-(2-hydroxy-ethyl)-amino)-propan-2-ol, hydrochloride (1:4)
Ingredient
Ingredient Facts
Hydroxypropyl bis (N-hydroxyethyl-p-phenylenediamine) hcl
AKA: 128729-28-2, Imexine OAX, Hydroxypropyl bis(N-hydroxyethyl-p-phenylenediamine) hydrochloride, UNII-0K832J58E7, 0K832J58E7, DTXSID30155976, 2-Propanol, 1, 3-bis((4-aminophenyl)(2-hydroxyethyl)amino)-, Tetrahydrochloride, 3-Bis-((4-amino-phenyl)-(2-hydroxy-ethyl)-amino)-propan-2-ol, Hydrochloride (1:4)
Ingredient · Hair Dyeing · EWG: 4
Synthetic
Not Clean
1,4-Benzenediamine, N(4)-(2-hydroxyethyl)-N(1),N'(1)-[2-hydroxypropanediyl]-
Formula
C19H32Cl4N4O3
Mol. Weight
506.30
CAS #
128729-28-2
Form
Liquid
See origin →
Functions
Hair Dyeing
Colors Hair
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.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Allergen Warning
⚠️ PPD (Hair Dye)
EWG
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUpermitted
JAPANpermitted
CANADApermitted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR