Sodium Hexametaphosphate

We are offering sodium hexametaphosphate. Industrial grade: total phosphate, as p2o5%≥ 68.0; inactive phosphate, as p2o5%≤ 7.5; iron, as fe %≤ 0.05; ph ＆#118alue (1% solution) %≤ 5.8-7.3; solubility: qualified; water insoluble %≤ 0.05 food grade: total phosphate, as p2o5%≥ 68.0; inactive phosphate, as p2o5%≤ 7.5; iron, as fe %≤ 0.05; ph ＆#118alue (1% solution) %≤ 5.8-6.5; solubility: qualified; heavy metals, as pb %≤ 0.001 arsenic, as as%≤ 0.0003 fluoride as f%≤ 0.003 water insoluble %≤