... Henan China (Mainland) Grade Standard: Industrial Grade Purity: 68% Appearance: white powder Application: Industrial production colour: whiteSpecification ... ItemPurityMain content (based on P2O5) %≥68.0Inactive phosphate(based on P2O5) %≤7.5PH value(1 ... separating agent, water softener and buffer, etc. 68% (SHMP) Sodium hexametaphosphate with best price (NaPO3)6