High-Purity Synthetic Silica Gel for Chromatography from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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