2932.99.90/Butyrolactam (2-Pyrrolidone)/Japan

Butyrolactam (2-Pyrrolidone) from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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