Monosodium Phosphate (MSP)：Colorless crystalline or white crystalline powder; Odorless and salty in taste. Slightly deliquescent. Easy to dissolve in water, almost insoluble in ethanol. Loss of water at 100 ℃. Its aqueous solution is acidic. Used as an auxiliary agent for reactive dyes. Used for phosphate modified starch. Prepare specialized composite food phosphates.