... drilling mud, preservative agent for paper making, organic synthesis catalyzer, and used in epuration of petroleum product ... industry and pharmaceutical industry, also widely used in gum synthesis, foodstuff industry, and poultry process.3, Specifications: ... 57.0 Water insoluble %; 0.1 Iron, as Fe %; 0.015 pH of 1% water solution 9 ... .0 Water insoluble %; 0.05 Iron, as Fe %; 0.01 pH of 1% water solution 9 ...