Coarse-Pore Synthetic Silica Gel for Water Filtration from Mexico
Synthetic silica gel with large pores used in preliminary water purification stages. Remains under HTS 2811.22.10.00 as pure synthetic silicon dioxide.
Duty Rate — Mexico → United States
13.7%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Document pore volume (>1.0 ml/g) for filtration grade
• NSF/ANSI 61 certification needed for drinking water contact
• Bulk densities affect volumetric duty calculations