</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

Phenobarbital Sodium Powder from Japan

Phenobarbital sodium is the sodium salt of phenobarbital, a barbiturate with a pyrimidine ring structure, used primarily as an anticonvulsant and sedative. It falls under HTS 2933.53.00.00 as it is explicitly listed as phenobarbital (INN) and its salts. This chemically defined heterocyclic compound is imported in bulk powder form for pharmaceutical manufacturing.

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

Provide DEA registration and end-use certificates as barbiturates are DEA Schedule IV controlled substances requiring strict import documentation

Ensure COA (Certificate of Analysis) verifies chemical purity >98% and confirms pyrimidine structure per chapter notes

Avoid misclassification as finished dosage forms; bulk powders must not be tableted or capsulated