Triethylenemelamine (TEM) from China
Triethylenemelamine contains a triazine ring in its ethylenimine trimer structure, classified as an 'other' unfused triazine under HTS 2933.69.60. Historically used in chemotherapy, it exemplifies Chapter 29's coverage of nitrogen heterocycles with therapeutic potential akin to heading 2937 hormones.
Duty Rate — China → United States
23.5%
Rate breakdown
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
9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
Import Tips
• FDA import alerts apply; provide pharmaceutical intermediate documentation
• Confirm stability additives qualify under note (f) without changing general-use status
• Avoid bulk pharma packaging resembling Chapter 30 exclusions