Homopiperidine Stabilized with BHT from China
Homopiperidine (hexamethyleneimine) stabilized with butylated hydroxytoluene (BHT) to prevent oxidation during storage and transport. Falls under HTS 2933.99.89.00 per Chapter 29 note (f) allowing stabilizers necessary for preservation without changing specific use. Used in fine chemical manufacturing.
Duty Rate — China → United States
112.5%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Document stabilizer ≤0.1% by weight with HPLC certificate to qualify under Chapter note (f); excess shifts to mixtures
• Use Type 1A1 steel drums with PTFE lining; inspect for corrosion as common failure point with basic heterocycles
• Declare exact stabilizer composition on commercial invoice; FDA may require for pharma intermediate pathway