sodium hexametaphosphate purity:68% Package: in 25kg drum CAS: 68915-31-1 MF: Na3O10P3X2 MW: 321.88 EINECS: 272-808-3 Product Sodium Hexametaphosphate (SHMP)Formula (NaPO3)6SpecificationIndustry Grade HG/T2519-1993 or customer's demand . Food Grade: GB1890-1989 FCC or custome:r's demand.UsageMainly used as softener of boiler-water & industry-use water, water-treatment agent of cooling circular water and as quality improver in food industry.Package 25Kg,50Kg bags or according to customer's demand.