Uses of Oxalic acid or Polyprotic acid
(i) Oxalic acid is used in the manufacture of carbon monoxide, formic acid and allyl alcohol.
(b) Oxalic acid is used as a laboratory reagent and as a standard substance in volumetric analysis.
(c) Oxalic acid is used in the form of antimony salt as a mordant in dyeing and calico printing.
(d) Oxalic acid is used in the manufacture of inks.
(e) Oxalic acid is used for removing ink stains and rust stains and for bleaching straw, wood and leather.
(f) In the form of ferrous potassium oxalate as developer in photography.