Sodium Silicate Solution (Water Glass) from Mexico
A viscous, aqueous solution of sodium silicate, commonly known as water glass, used in detergents, adhesives, and as a concrete sealant. It falls under HTS 2839.90.5000 as a commercial alkali metal silicate, specifically sodium silicate in its soluble form, distinct from solid or fused varieties.
Duty Rate — Mexico → United States
13.1%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Verify concentration and purity via Certificate of Analysis to confirm classification as chemically defined alkali metal silicate
• Ensure proper hazardous material labeling if shipped as liquid; common pitfall is misdeclaring as soap or detergent base
• Obtain EPA approvals for industrial uses like wastewater treatment to avoid customs holds