Sodium Hexametaphosphate

We are offering Sodium Hexametaphosphate. item industry grade food grade total phosphate 68%min 68%min inactive phosphate 7.5%max 7.5%max water insoluble matters 0.05%max 0.05%max iron 0.05%max 0.05%max ph value 5.8-7.3 5.8-6.5 heavy metal 10ppm max arsenic 3ppm max fluoride 30ppm max degree of polymerization 9-21 9-21.