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Sodium oxalate, or disodium oxalate, is the sodium salt of oxalic acid with the formula Na2C2O4. It is usually a white, crystalline, odorless powder, that decomposes at 250–270 °C.
S 2207 (OTTO) Sodium oxalate, GR 99%+ Cas 62-76-0 - used as a primary standard for standardizing KMnO4 solutions.