... 2.0-3.0 (10% solution) water treatment chemical, intermedites.. Oxalic Acid Chemical formula: H2C2O4·2H2OAppearance:white crystal Composition:PH 2.0 ... pharmacy,dye,printings,buildings and rare metal production etc.Package:n.w.25kgs plastic-lined woven bags or as per order ... %maxArsenic (as As)0.1%maxHeavy metal (as Pb), ppm10max Oxalic Acid