Manufacturing Process Phase A: Add Allantoin to water and heat to 40 °C. Stir until complete dissolution. Add Glycerin and Cosphaderm® Propanediol natural. While stirring add Cosphaderm® X 34. Stir until complete dissolution. Then add Aristoflex® AVC and stir until complete dissolution. Phase B: Prepare phase B and separately heat phase A and phase B to 80 °C. Add phase B to phase A while stirring. has not