Sodium dihydrogen phosphate dihydrate acts as buffering capacity reagent in molecular biology, biochemistry and chromatography. It is used in the preparation of biological buffers.
Sodium dihydrogen phosphate, also known as monosodium phosphate, is a chemical compound with the formula NaH2PO4.2H₂O . It is acidic. It is used in some baking powders. It is used as a laxative or a pH buffer. It is made by reaction of a little sodium hydroxide with phosphoric acid.