HS CodesVI · Products of the chemical or allied industries28 · Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes2810281000281000Chapter 28Copy pageOxides of boron; boric acidsDescriptionOxides of boron; boric acidsWas this page helpful?YesNoPrevious280920Phosphoric acid and polyphosphoric acidsNextHydrogen fluoride (hydrofluoric acid)281111