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 isotopes28092809Chapter 28Copy pageDiphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically definedDescriptionDiphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically definedSubheadings280910Diphosphorus pentaoxide280920Phosphoric acid and polyphosphoric acidsWas this page helpful?YesNoPrevious2808Nitric acid; sulphonitric acidsNextOxides of boron; boric acids2810