Sodium hypophosphite has a phosphorus valence of +1 and strong reducing properties, making it widely used in electroless nickel plating, halogen-free flame retardant production, and pharmaceutical intermediate synthesis. Under oxidizing conditions, it can produce sodium phosphite or sodium phosphate, among other normal salts. So, what is the phosphorus content of sodium hypophosphite? How is it calculated?

The chemical formula of sodium hypophosphite is NaH2PO2.H2O. It has only one phosphorus atom and a molecular weight of 106. The molecular weight of phosphorus (P) is 31. Therefore, we can calculate P% using a simple chemical formula: P%=31/106 =29.24%. This refers to the phosphorus content of the pure compound. If the effective content is insufficient, the actual phosphorus content needs to be calculated by multiplying P% by the effective content.

Through the above calculation, we can see that the phosphorus content of sodium hypophosphite is 29.24%. The phosphorus content of various aqueous solutions needs to be calculated based on the effective component. NaH2PO2can act as an antioxidant and metal ion reducing agent in many industries. The reaction is most suitable in a slightly acidic environment with a pH of 2-5; its reducing power will weaken under alkaline conditions. Appropriate heating can accelerate the reaction. Strong oxidizing ions will preferentially consume sodium hypophosphite, so they need to be removed beforehand or their concentration controlled.