An electric device (20) is described for vaporizing oxalic acid, comprising a container (1) adapted to contain oxalic acid to be heated, a heater (4) and a temperature-sensitive element (2) connected to the container (1), the heater (4) and temperature- sensitive element (2) being further electrically connected to a controlling and regulating device (10) configured for connecting the heater (4) to a power supply to keep the temperature of the container (1) at a pre-established value, the temperature-sensitive element (2) being configured for modifying the electric supply of the heater (4) through the controlling and regulating device (10) when a pre-set temperature is reached.
