Potassium iodide

200

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

1 mmHg ( 745 °C)

REDUCING SUBSTANCES complying

puriss. p.a.

≥99.0%, 99.0-100.5% (calc. to the dried substance)

solid

≤0.0005% heavy metals (as Pb), ≤0.001% total nitrogen (N), ≤0.005% thiosulfate (S₂O₃), ≤0.02% free alkali (as KOH)

≤0.5% loss on drying, 105 °C

6.0-8.0 (20 °C, 5%)

681 °C (lit.)

water: complete (ca.1,430 g/l at 25 °C (77 °F))

bromide, chloride (as Cl^-): ≤100 mg/kg, iodate (IO₃^-): ≤2 mg/kg, phosphate (PO₄^3-): ≤10 mg/kg, sulfate (SO₄^2-): ≤10 mg/kg

As: ≤0.1 mg/kg, Ba: ≤20 mg/kg, Ca: ≤10 mg/kg, Fe: ≤3 mg/kg, Mg: ≤10 mg/kg, Na: ≤300 mg/kg

[K+].[I-]

1S/HI.K/h1H;/q;+1/p-1

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