Oxides of Boron & Boric Acids

Turkey dominates US supply of boron oxides and boric acids, reflecting that country's vast natural boron mineral reserves, with Peru, Italy, Chile, and Spain also contributing meaningfully. Boric acid and boron trioxide serve as critical inputs for fiberglass insulation, borosilicate glass, ceramics, and flame-retardant formulations. The single US tariff line covering this heading is 2810000000, which consolidates both boron oxides and boric acid under one statistical reporting number. Importers should monitor origin documentation carefully given Turkey's dominant position and any applicable trade-remedy exposure.