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2811.22.50.00/Synthetic Amorphous Silica Gel/Mexico

Synthetic Amorphous Silica Gel from Mexico

Synthetic amorphous silica gel is a porous form of silicon dioxide manufactured by acidifying sodium silicate, used as a desiccant. It is classified in HTS 2811.22.5000 as 'other' silicon dioxide, meeting Chapter 28 chemical definition.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Document pore volume and surface area to differentiate from natural silica; include MSDS confirming synthetic origin

• For beaded/granular forms, specify not calcined to avoid mineral product confusion