2-Amino-3-Hydroxypyridine
AKA “2-Amino-3-pyridinol, 3-Pyridinol, 3-Hydroxy-2-pyridinamine, 3-HYDROXY-2-AMINOPYRIDINE, JAROCOL 2A3HP, RODOL 2A3PYR”
Synthetic
Ingredient Facts
2-Amino-3-Hydroxypyridine
AKA: 2-Amino-3-pyridinol, 3-Pyridinol, 3-Hydroxy-2-pyridinamine, 3-HYDROXY-2-AMINOPYRIDINE, JAROCOL 2A3HP, RODOL 2A3PYR
Synthetic · Hair Dyeing · EWG: 4
Synthetic
Synthetic
Clean
A color-depositing ingredient that helps create and maintain vibrant, long-lasting hair dye results.
Formula
C5H6N2O
Mol. Weight
110.11
CAS #
16867-03-1
Form
Powder
See origin →
Functions
Hair Dyeing
Antioxidant Protection
Colors Hair
Traditional Use
A synthetic heterocyclic compound developed as a hair dye intermediate in the 20th century. It was created to expand the color palette available in oxidative hair coloring systems.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
Safety Assessment of 2-Amino-3-Hydroxypyridine as Used in Cosmetics.
Burnett CL, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2020
Safety Assessment of 2-Amino-3-Hydroxypyridine as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
2-Amino-3-Hydroxypyridine
European Commission
EU Cosmetic Ingredient Database (CosIng)
2-Amino-3-Hydroxypyridine
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR