sodium hexametaphosphate SHMP CAS NO 10124-56-8 Total phosphates (as P2 O 5 )% 68.32 Inactive Phosphates (as P2 O 5 )% 6.18 Iron (Fe) % 0.04 PH Value 6.20 Solubility Passed Polymerization 9-21 Insoluble in water 0.03 Arsenic as As 0.0002 Fluoride as F 0.002