“…In order to suggest alternatives to toxic propellants, more than 100 propellants with significant reduced toxicity were established in a database and different propellants were investigated in different propulsion systems within the framework of the GRASP project [74][75][76]78,82,90,97]. A number of the investigated propellants were hydrogen peroxide [77,[79][80][81]86,88,89,95,96,98], ethanol [92], kerosene [101], ammonium dinitramide (ADN) [93,102,134,159,[169][170][171][174][175]179,181,183,[185][186]200], turpentine [101], dipentene [97], and high density polyethylene (HDPE) [74,75].…”