Used in textile processing as a mordant to fix dyes on fabrics, particularly in natural fiber dyeing. Acts as a buffering agent in some cleaning formulations due to its mild acidic properties. Employed in metal surface treatment for cleaning and passivation of certain alloys. Occasionally utilized in analytical chemistry for standardization of oxidizing agents. Also found in some specialty ink formulations and lithography processes. Can serve as an intermediate in the synthesis of other oxalate compounds and is used in household cleaners to remove limescale and mineral deposits.