Hydroxypropyl Methylcellulose (HPMC) from China
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 — China → United States
41.7%
Rate breakdown
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Submit monomer composition analysis showing >95% qualifying units; segregate pharma vs construction grades for proper documentation; beware of origin marking requirements