Potassium nitrate

InChI key

FGIUAXJPYTZDNR-UHFFFAOYSA-N

InChI

1S/K.NO3/c;2-1(3)4/q+1;-1

SMILES string

[K+].[O-][N+]([O-])=O

grade

ACS reagent, puriss. p.a.

agency

USP/NF, reag. ISO, reag. Ph. Eur.

assay

≥99%

form

crystalline

impurities

≤0.001% ammonium (NH₄), ≤0.005% water insolubles

pH

5.5-7.5 (20 °C, 5%)

mp

334 °C (lit.)

anion traces

chloride (Cl^-): ≤10 mg/kg, iodate (IO₃^-): ≤5 mg/kg, nitrite (NO₂^-): ≤10 mg/kg, phosphate (PO₄^3-): ≤5 mg/kg, sulfate (SO₄^2-): ≤20 mg/kg

cation traces

Ca: ≤10 mg/kg, Cu: ≤5 mg/kg, Fe: ≤2 mg/kg, Mg: ≤20 mg/kg, Na: ≤50 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg, heavy metals: ≤5 ppm (by ICP-OES)

Quality Level

200