Oxalic acid content of 99.6%or more,crystalline or powder.In the chemical industry for the manufacture of pentaerythritol,cobalt oxalate.oxalic acid nickel,Basic Green,steel.soil analysis complete set fo reagents,chemical reagents,etc.Rapid dye used as a chromogenic agent and help straw,straw products,fabric bleach can remove the iron contamination on the track.