221309
Potassium phosphate monobasic
≥99.0%, ACS reagent
Synonym(s):
Potassium dihydrogen phosphate, prim.-Potassium phosphate
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About This Item
Product Name
Potassium phosphate monobasic, ≥99.0%, ACS reagent
pH
4.1-4.5
InChI key
GNSKLFRGEWLPPA-UHFFFAOYSA-M
InChI
1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1
SMILES string
[K+].OP(O)([O-])=O
grade
ACS reagent
assay
≥99.0%
impurities
≤0.001% N compounds
≤0.01% insolubles
loss
≤0.2% loss on drying
pKa (25 °C)
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
mp
252.6 °C (lit.)
density
2.338 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.003%
cation traces
Fe: ≤0.002%
Na: ≤0.005%
heavy metals: ≤0.001%
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