... textile, dyeing, petroleum, chemistry, metallurgy and construction materials etc. as water softener, flotation selecting agent, disperser and high temperature adhesive; In ... it used as an additive, nourishing agent, quality improver, pH regulator, metal ions chelating agent, adhesive and leavening agent etc. ... %≤ 0.05 0.05 4 pH of 1% water solution 5.8-7.3 5.8-6.5 5 Solubility Qualified Qualified ...