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I added 2.2 g of fumaric acid to 20 ml of methanol, and after dissolving at 65 °c, 0.4 g of ammonium bicarbonate was added gradually. After 1 hour, it starts to form a milky suspension. Could it be iminodisuccinic acid?
Accepted Answer
The reaction you describe is likely the formation of ammonium fumarate, not iminodisuccinic acid. Fumaric acid is a dicarboxylic acid, and ammonium bicarbonate is a source of ammonium ions. When mixed, they react to form ammonium fumarate, which is less soluble in methanol than fumaric acid. This explains the milky suspension you observed. Iminodisuccinic acid synthesis typically involves reacting maleic anhydride with ammonia, not fumaric acid and ammonium bicarbonate.
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