Next ointment breaks. How do I make this preparation? Hydroquinc 5% eucerine 50 g aqua 50 g

Breaking the CR è me can know different causes. To begin with, it is not easy to emulsify equal parts of water and Eucerin. The Hydroquina is still here. This product has a solubility of 1 to 14 in water. This means you need 70 ml of water to dissolve 5 g. This is of course very much and therefore I would ask the doctor to reduce the Hydroquinte to 4 G, so that you only need 56 g of water. If this solution does not occur in 44 g Eucerin then we stabilize the W/O cr è me by adding 2 g of Arlacel C. The amount of Eucerin is then 42 g.