Assay . . 99.5% min

LOD . . 0.2% max

Iodate . . 0.0004% max

Cl & Br . 0.01% max

SO4 . . . 0.005% max

Thiosulfate 0.005% max

Heavy metals as Pb 0.0005%max

Fe . . . . . 0.003% max

Ca . . . . . 0.005% max

Mg . . . . 0.005% max

Cu . . . . 0.0002% max

Ba . . . . 0.002% max

As . . . . . 0.00001% max

PO4 . . . . 0.001% max

N cpds as N . 0.001% max

Na . . . . 0.005% max

CAS 7681-11-0; KI = 166.00