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Division 3.7 Di-sodium hydrogen phosphate solution, c = 0,025 mol/l.

United Kingdom

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Dissolve 3,55 g of anhydrous (or 4,45 g of dihydrate or 8,95 g of dodecahydrate) di-sodium hydrogen phosphate in water (equivalent to HPLC grade) in a 1 litre graduated flask, make up to the mark and mix.