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click to enlarge product name：edta/edta acid/edta2na/edta4na description： edta/edta acid/edta2na/edta4na 99 pourcent cas no: 62-33-9 ph(1 pourcent) 6.5_7.5 edta is mainly used as complexing agent which is widely applied in fields like water treatment, photo processing, oil production, boiler cleaning and laboratory. we are exporter in tianjin china, we mainly deal with all kinds of chemical. we can supply edta acid, edta 2na, edta 4na. and edta fe 13 pourcent, edta mn, edta zn 15 pourcent, edta mn 13 pourcent.