3-Hydroxykynurenine (Standard) is the analytical standard of 3-Hydroxykynurenine. This product is intended for research and analytical applications. 3-Hydroxykynurenine, a metabolite of tryptophan, is a potential endogenous neurotoxin whose increased levels have been described in several neurodegenerative disorders. 3-Hydroxykynurenine induces neuronal apoptosis[1].