This n-boc-piperidine, also known as 1-Boc-isonipecotic Acid, presents as a white to very pale-yellow crystalline powder. Store in a cool and dark place at ambient temperatures. 1-(tert-Butoxycarbonyl)-4-piperidinecarboxylic Acid is incompatible with oxidizing agents and should not be kept or handled near them. This chemical causes skin irritation as well as serious eye irritation.