Chemical substances, chemical materials and chemical preparations, and natural elements, namely, nitrous oxide in the nature of propellant gas for aerosols and nitrous oxide for industrial use; Nitrous oxide and other gas mixtures consisting of nitrous oxide in the nature of propellant gases for aerosols; Nitrous oxide for industrial use; Nitrous oxide in the nature of propellant gas for aerosols; Propellant gases for aerosols; all of the foregoing for use in the food industry