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2926.30.20.00/Fenproporex Precursor Base (4-Cyano-2-Dimethylamino-4,4-Diphenylbutane)/Japan

Fenproporex Precursor Base (4-Cyano-2-Dimethylamino-4,4-Diphenylbutane) from Japan

4-Cyano-2-dimethylamino-4,4-diphenylbutane serving dual role as precursor for both fenproporex (appetite suppressant) and methadone production. Tariffed under HTS 2926.30.2000 for its explicit chemical identification as a nitrile-function methadone intermediate. Qualifies under Chapter 29 as a pure organic compound used in hormone-related pharmaceutical synthesis.

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

• Dual end-use requires specifying primary application in entry summary to align with tariff intent

• Include stabilizer analysis to ensure additions comply with Chapter Note 1(g) for identification/safety

Fenproporex Precursor Base (4-Cyano-2-Dimethylamino-4,4-Diphenylbutane) from Japan — Import Duty Rate | HTS 2926.30.20.00