NPP Stabilized with Antioxidant from Germany
N-Phenethyl-4-piperidone (NPP) with added BHT stabilizer to prevent oxidation during storage and transport, as permitted under Chapter 29 note 2(f). Retains chemical identity as heterocyclic nitrogen compound of 2933.37.00.00. Used in synthesis of opioid receptor compounds and research chemicals.
Duty Rate — Germany → United States
6.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Include stabilizer composition (<1% by weight) in SDS; must prove addition solely for preservation per note 2(f)
• Maintain cold chain logistics (2-8°C) as specified; temperature logs prevent degradation claims
• Cross-check stabilizer doesn't create 'specific use' formulation disqualifying Chapter 29 classification