N-Phenylmaleimide from Japan
N-Phenylmaleimide is a cyclic imide with carboxyimide-function, but classified here under imine derivatives per Chapter Note 3 (last in numerical order) in HTS 2925.29.90.00. Key Diels-Alder dienophile.
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%
Import Tips
• Submit X-ray crystal structure confirming planar imide ring system
• Declare melting point (88-92°C) and purity by HPLC (>99%)
• Include polymerization inhibitor (hydroquinone) concentration