Levorphanol (S)-Tartrate Dihydrate from China
Levorphanol (S)-tartrate dihydrate is a crystalline salt of levorphanol with tartaric acid, containing water of crystallization. The hydrated form does not change the chemical identity of the salt, so it remains classified as a salt of levorphanol (INN) under this tariff item.
Duty Rate — China → Canada
0%
Import Tips
• Confirm that the dihydrate form is listed on the import permit, as variations in hydration may require additional documentation
• Provide the certificate of analysis showing the salt identity and water content
• Check with CBSA whether the product qualifies for duty relief under a controlled substances program