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Stannous chloride SnCl2 AR 500g

It is in analytical chemistry. Reagent for arsenic,
gold, mercury, bismuth and for reducing iron (III) to
iron (II) in volumetric analysis

(Tin (II) Chloride)
SnCl2.2H2O = 225.63
Assay 98 – 103%
Insoluble matter 0.01% max
Sulphate (SO4) 0.002% max

Ammonium (NH4) 0.002% max
Arsenic (As) 0.0001% max
Iron (Fe) 0.002% max
Lead (Pb) 0.005% max
Sodium (Na) 0.01% max
Potassium (K) 0.005% max