Color (Hazen): 20 max Assay : 99.5% min Ash : 0.15% max Moisture : 0.5% max It can be used as light stability agent and also the key intermediate for medicine, bleaching agent, polymerization inhibitor and epoxy resin cross linking agent. 1,2,2,6,6-Pentamethyl-4-Piperidinol (PMP)