Levorphanol Sulfate from Canada
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 — Canada → United States
110%
Rate breakdown
9903.04.60100%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
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