... sample 4,68%,white powder sodium hexametaphosphate (SHMP) Quick Details Classification: PhosphateType: Sodium HexametaphosphateCAS No.: 10124-56-8Place of Origin: Henan China (Mainland ... .05 4 pH of 1% water solution 5.8-7.3 5.8-6.5 5 Solubility Qualified Qualified 6 Heavy metal ... , as Pb, %≤ - 0.001 7 Arsenic, as As, %≤ - 0.0003 8 Fluoride, as F, %≤ - 0.003 9 Water insoluble, %≤ 0.05 ...