... -10.0 Fluoride as F%≤ 0.003 Arsenic, as As%≤ 0.0003 Heavy metal, as Pb%≤ 0.001 Chloride, as cl% ≤ 0 ... Used as main detergent builder: As soft water agent, as detergent building foaning agent, as emulsifier of oils and greases, as peptizing agents, as pH buffers ... , and to provide alkalinity. Used in petroleum induatry as peptizing and deflocculation ...