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2933.99.90.00/Diphenhydramine Hydrochloride API/Japan

Diphenhydramine Hydrochloride API from Japan

Diphenhydramine HCl, first-generation antihistamine with piperazine-like nitrogen heterocycle, falls under HTS 2933.99.90.00 as a drug. Widely imported for Benadryl production and motion sickness treatments.

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

• Ensure USP <467> microbial limits testing certification

• Monitor for residual solvents per ICH Q3C

• Label with 'may impair driving' warnings per FDA

Diphenhydramine Hydrochloride API from Japan — Import Duty Rate | HTS 2933.99.90.00