Butyrolactam (2-Pyrrolidone) from China
2-Pyrrolidone contains oxygen in lactam structure (five-membered ring), used in pharmaceuticals and polymers. Dual O/N heteroatoms but oxygen heading applies. HTS 2932.99.90 classification.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Lactam vs amide distinction critical; cyclic lactam qualifies as heterocycle
• Hygroscopic; sealed packaging maintains purity specs
• NMP substitute; end-use statements distinguish applications