Cholestyramine Resin USP Powder from Mexico
Cross-linked polyvinylbenzyltrimethylammonium chloride, known as Cholestyramine Resin USP, is a pharmaceutical-grade ion-exchange resin used primarily to bind bile acids in the intestine for treating hypercholesterolemia. It falls under HTS 3914.00.20.00 as it precisely matches the specified polymer in primary form with >95% monomer content per subheading notes.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify USP certification and provide Certificate of Analysis (CoA) to confirm cross-linked polyvinylbenzyltrimethylammonium chloride composition; declare exact monomer content to meet 95% rule in subheading notes; avoid misclassification as unfinished pharmaceutical by including lab test results