Carboxymethyl Cellulose (CMC) from Mexico
Carboxymethyl cellulose is a cellulose ether derivative produced by reacting cellulose with sodium hydroxide and chloroacetic acid, used as a thickener in food and pharmaceuticals. It falls under HTS 3912.39.00.00 as a cellulose ether not elsewhere specified, meeting the criteria for primary form polymers where the cellulose ether structure predominates.
Duty Rate — Mexico → United States
4.2%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Verify purity and degree of substitution to confirm classification as primary form; provide certificates of analysis for monomer content compliance; avoid misclassification with cellulose esters under 3912.11