... , textile, dyeing, petroleum, chemistry, metallurgy and construction materials etc. as water softener, flotation selecting agent, disperser and high temperature adhesive; In ... , as Fe, %≤ 0.05 0.05 4 pH of 1% water solution 5.8-7.3 5.8-6.5 5 Solubility ... As, %≤ - 0.0003 8 Fluoride, as F, %≤ - 0.003 9 Water insoluble, %≤ 0.05 0.06