Cosmetics Formulation Development

Order CosmoWhite™ (1-Methylhydantoin-2-Imide) Come on. In the information, it says that it is soluble. But bring it to melt and not melted balance. Stir it for a long time. It still hasn't melted. Is there another way to dissolve it?

Hello, I would like to ask about the melting rate. In this step, there is water in บีกเกอร์ how many grams and add CosmoWhite how many grams?