Hydroxypropyl Methylcellulose (HPMC) from Canada
HPMC is a semisynthetic cellulose ether combining hydroxypropyl and methyl groups, widely used in pharmaceuticals, construction mortars, and vegan capsules. Under HTS 3912.39.00.00 as other cellulose ethers, classified by predominant monomer units per chapter notes.
Duty Rate — Canada → United States
14.2%
Rate breakdown
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
• Submit monomer composition analysis showing >95% qualifying units; segregate pharma vs construction grades for proper documentation; beware of origin marking requirements