potassium oxalate

noun

Definition of potassium oxalate

  1. :  any of three crystalline oxalates of potassium: a :  the normal efflorescent soluble salt K2C2O4.H2O used chiefly in preventing the clotting of blood (as in blood tests) and formerly in photography b :  a bitter poisonous acid salt KHC2O4.H2O found especially in oxalis and rhubarb and used chiefly in removing ink stains and scouring metals; potassium hydrogen oxalate —called also potassium acid oxalate, salt of sorrel c :  potassium tetroxalate

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