The dust content and electrostatic charge of aluminium oxide (alumina) has been measured with the Faraday cup and in an electrostatic deflection apparatus. The dust was made and released from a fluidized bed. After generation, the dust entered the measurement zone where it was separated according to charge. Large differences in the electrostatic charge and the dusting behavior were observed. The charge of the alumina dust is generally relatively neutral, but aluminas with highly charged particles were observed. The dusting profile varies considerably. Some powders released dust only in the beginning of the test, while others constantly released dust.