Sodium Dichromate Dihydrate, Reagent A.C.S.

Assay:99.5-100.5%
Na2Cr2O7 · 2H2O
MAXIMUM ALLOWABLE 
Insoluble matter: 0.005%
Chloride (Cl): 0.005%
Sulfate (SO4): 0.01%
Calcium (Ca): 0.003%
Magnesium (Mg): 0.005%
Potassium (K): 0.01%
Aluminum (Al): 0.002%
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