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 isotopes28102810Chapter 28Copy pageOxides of boron; boric acidsDescriptionOxides of boron; boric acidsSubheadings281000Oxides of boron; boric acidsWas this page helpful?YesNoPrevious2809Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically definedNextOther inorganic acids and other inorganic oxygen compounds of non-metals2811