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 for 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.