Sodium phosphate is phosphate and is an inorganic compound. In dry air easy to deliquescence weathering, the formation of sodium dihydrogen phosphate and sodium bicarbonate. It is almost completely decomposed into disodium hydrogen phosphate and sodium hydroxide in water. Electroplating industry used for preparation of surface treatment to remove oil, unpolished parts of the alkaline detergent. In the synthetic detergent formula, due to the high alkalinity, only used for strong alkalinity cleaning agent formula, such as car cleaning agent, floor cleaner, metal cleaning agent.