Loses H2O at 400°C, forming metaphosphate | CAS: 7778-77-0 | H2KO4P | 136.08 g/mol Potassium dihydrogen phosphate is used as a food additive, fertilizer (NPK), paint additive, coating additive, adhesive, buffering agent and in optical modulators. It is extensively used in research and analytical laboratories as a buffer in mobile/sample preparations for analysis by high pressure liquid chromatography (HPLC) and also in organic synthesis. MKP, monopotassium phosphate, owing to its non-linear optical properties, is used in optical modulators and for second-harmonic generation (SHG). This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals. ApplicationsPotassium dihydrogen phosphate is used as a food additive, fertilizer (NPK), paint additive, coating additive, adhesive, buffering agent and in optical modulators. It is extensively used in research and analytical laboratories as a buffer in mobile/sample preparations for analysis by high pressure liquid chromatography (HPLC) and also in organic synthesis. MKP, monopotassium phosphate, owing to its non-linear optical properties, is used in optical modulators and for second-harmonic generation (SHG).SolubilitySoluble in water. Slightly soluble in ethanol.NotesLoses H{2}O at 400°, forming metaphosphateHygroscopic.

Key	Value
CAS	7778-77-0
Molecular Formula	H2KO4P
Molecular Weight (g/mol)	136.08
MDL Number	MFCD00011401 MFCD00147253
PubChem CID	516951
ChEBI	CHEBI:63036
IUPAC Name	potassium dihydrogen phosphate
SMILES	[K+].OP(O)([O-])=O
Melting Point	253°C
Quantity	500 g
Assay Percent Range	≥98%
Solubility Information	Soluble in water. Slightly soluble in ethanol.
Formula Weight	136.09
Sensitivity	Hygroscopic
Density	2.338
Chemical Name or Material	Potassium Dihydrogen Phosphate

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