| http://www.w3.org/ns/prov#value | - Customary colourless organic and inorganic anions, for example chloride, bromide, iodide, hydroxide, hydrogen sulphate, sulphate, nitrate, dihydrogen phosphate, hydrogen phosphate, phosphate, carbonate, methosulphate, ethosulphate, formate, acetate, propionate, benzenesulphonate and toluenesulphonate, are suitable as the anion A.sup.???.
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