Monohydrogen phosphate is the
inorganic ion with the formula
PO4sup>2-. Its formula can also be written as
O3(OH)sup>2-, which shows the presence of a O-H bond. Together with
dihydrogen phosphate
Dihydrogen phosphate or dihydrogenphosphate ion is an inorganic ion with the formula 2PO4sup>−. Phosphates occur widely in natural systems.
These sodium phosphates are artificially used in food processing and packaging as emulsifying agents, ...
, monohydrogen phosphate occurs widely in natural systems. Their salts are used in fertilizers and in cooking.
Most monohydrogenphosphate salts are colorless, water soluble, and nontoxic.
Acid-base equilibria
Monohydrogenphosphate is an intermediate in the multistep conversion of
phosphoric acid
Phosphoric acid (orthophosphoric acid, monophosphoric acid or phosphoric(V) acid) is a colorless, odorless phosphorus-containing solid, and inorganic compound with the chemical formula . It is commonly encountered as an 85% aqueous solution, w ...
to
phosphate
In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid .
The phosphate or orthophosphate ion is derived from phosph ...
:
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Examples
*
Diammonium phosphate
Diammonium phosphate (DAP; IUPAC name diammonium hydrogen phosphate; chemical formula (NH4)2(HPO4) is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid.
Solid diammonium phosp ...
, (NH
4)
2HPO
4
*
Disodium phosphate, Na
2HPO
4, with varying amounts of water of hydration
References
Ions
Phosphates