Theophylline Guaiacol Ester from Mexico
Theophylline guaiacol ester is an ester formed between theophylline and guaiacol, used for sustained release. As an ester of a theophylline derivative, it is classified under tariff item 2939.59.00 as 'Other', per Chapter 29 Note 5(A). The product is a separate chemically defined compound.
Duty Rate — Mexico → Canada
0%
Import Tips
• Confirm the ester is a single compound; mixtures may shift classification
• Provide a detailed chemical structure to CBSA to substantiate the ester claim
• Check if the product is listed in the Prescription Drug List (PDL) for import controls