Potassium phosphate monobasic buffer substance anhydrous puriss. p.a. ACS reagent reag. ISO reag. Ph. Eur. 99.5-100.5%

Code: 60220-1KG-M D2-231


 

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agencyreag. ISO, reag. Ph. Eur.
anion traceschloride (Cl-): ≤5 mg/kg, sulfate (SO42-): ≤30 mg/kg
assay99.5-100.5%
bp>450 °C
cation tracesNa: ≤50 mg/kg, Mn: ≤5 mg/kg, Cr: ≤15 mg/kg, Mg: ≤5 mg/kg, Ca: ≤10 mg/kg, Pb: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, heavy metals: ≤0.001% (by ICP-OES), Zn: ≤5 mg/kg, Ni: ≤5 mg/kg, As: ≤0.5 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg
density2.338 g/mL at 25 °C (lit.)
formcrystalline
gradeanhydrous, puriss. p.a., ACS reagent
impurities≤0.001% total nitrogen (N)
InChI keyGNSKLFRGEWLPPA-UHFFFAOYSA-M
InChI1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1
loss≤0.2% loss on drying, 105 °C
mp252.6 °C (lit.)
pH4.2-4.5 (20 °C, 5%)
pKa (25 °C)(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
SMILES string[K+].OP(O)([O-])=O
Cas Number7778-77-0
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