Potassium Sodium Tartrate Tetrahydrate, Reagent A.C.S.

Assay:99.0-102.0%
KNaC4H4O6 · 4H2O
pH of a 5% solution:6.0-8.5 at 25 °C
MAXIMUM ALLOWABLE 
Insoluble matter: 0.005%
Chloride (Cl): 0.001%
Phosphate (PO4): 0.002%
Sulfate (SO4): 0.005%
Ammonium (NH4): 0.002%
Calcium (Ca): 0.005%
Heavy metals (as Pb): 5 ppm
Iron (Fe): 0.001%
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