0 0 0 0 0 0 0 0 0 2811 Inorganic acids and inorganic oxygen compounds of non-metals (excl. hydrogen chloride ‘hydrochloric acid’, chlorosulphuric acid, sulphuric acid, oleum, nitric acid, sulphonitric acids, diphosphorus pentaoxide, phosphoric acid, polyphosphoric acids, oxides of boron and boric acids)