Silicates & Commercial Alkali Metal Silicates (NESOI)

Potassium silicate (2839901000) and other non-sodium alkali metal silicates (2839905000) serve as key inputs in detergents, adhesives, refractory cements, and specialty coatings. Imports under this heading are subject to Section 301 tariffs when sourced from China, making origin diversification a practical concern for procurement teams. Mexico and Canada are the leading suppliers, with Japan and Portugal also contributing meaningfully to US import volumes. Classification hinges on the specific alkali metal cation and whether the product qualifies as a commercial-grade silicate solution or a defined chemical compound.