The function of Sodium lauryl sulfate (SLS) in the formula below is? Hydrophilic Ointment, USP, has the following formula for 1,000 g: Methylparaben 0.25 g Propylparaben 0.15 g Sodium lauryl sulfate 10 g Propylene glycol 120 g Stearyl alcohol 250 g White petrolatum 250 g Purified water 370 g