Oxalic Acid Dihydrate, Reagent A.C.S.

Assay:99.5-102.5%
H2C2O4 · 2H2O
Substances darkened by hot sulfuric acid:Passes test
MAXIMUM ALLOWABLE 
Insoluble matter: 0.005%
Residue after ignition: 0.01%
Chloride (Cl): 0.002%
Sulfate (SO4): 0.005%
Calcium (Ca): 0.001%
Nitrogen compounds (as N): 0.001%
Heavy metals (as Pb): 5 ppm
Iron (Fe): 2 ppm
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