Levorphanol Sulfate from Japan
Levorphanol sulfate represents the sulfate salt variant of levorphanol (INN), a heterocyclic opioid with nitrogen-containing isoquinoline structure. HTS 2933.41.00.00 applies directly as specified salts of this INN compound, per Chapter 29 scope for chemically defined organic compounds. Primarily imported as high-purity intermediate for analgesic formulations.
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
• Include pharmacopeial compliance (USP/EP) documentation; declare exact salt form to match HTS specificity
• Watch for anti-dumping scrutiny on pharma APIs from certain origins