Proxyphylline Pure Substance from United States
Proxyphylline is 7-(2-hydroxypropyl)theophylline, a theophylline derivative used as an expectorant. It is a separate chemically defined compound, classified under tariff item 2939.59.00 as 'Other' theophylline derivatives. The product is a bulk pharmaceutical chemical.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the product is not a mixture of isomers; if it is, Chapter Note 1(b) applies
• Provide a certificate of analysis to CBSA to verify purity
• Check if the product is listed in the Prescription Drug List (PDL) for import controls