High-Purity Synthetic Silica Gel for Chromatography from Mexico
Amorphous synthetic silica gel with controlled pore size used as stationary phase in column chromatography for lab separations. Falls under HTS 2811.22.10.00 as synthetic silicon dioxide, a separate chemically defined compound per Chapter 28 notes, excluding organo-silicon derivatives.
Duty Rate — Mexico → United States
13.7%
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
• Supply pore size distribution and surface area specs to prove chromatography-grade purity
• Ensure no organic modifiers; pure silica gel stays in 2811, modified becomes 3824
• Declare particle size (e.g
• 40-63 micron) in entry docs to prevent reclassification as abrasives