Edta na4.4h2o specification Product name : edta tetrasodium salt; edtana4 ; Description Appearance :pure white crystalline powder. Free flowing. Water-insoluble:not more than 0.1% Chlorides (cl):not more than 0.005% (50 ppm). Sulphate (so4)% : not more than0.1% Iron% (fe) : not more than 0.001% (10ppm) Chelate value (caco3/g) : 200-215 Heavy metal(lead):not more than 0.001% (10 ppm) Torrefaction weightlessness : not more than0.01% Ph (1% w/v solution):10.5to 11.5 Purity (assay): minimum 99.0%. Packed in complex bag with plastic inner,25KG net per bag.