It is used in many fields, including as an esterifying agent for organic synthesis, and in photographic chemicals, pharmaceuticals, printing and dyeing mordants, buffers, chemical reagents, meat preservation, pigments, and leather tanning.It can be used to produce various chemical products, such as furan, acrylic acid, acetates, and chloroacetic acid.As a buffer for condiments, it moderates unpleasant odors, prevents discoloration, and has a certain antifungal effect.It is also used as an acidulant for seasoning pastes, pickled vegetables, mayonnaise, fish cakes, sausages, bread, and rice cakes.When mixed with methylcellulose, phosphates, etc., it improves the preservation of sausages, bread, rice cakes, and other products.It is used as a general analytical reagent, mordant, and buffer, and also in dye synthesis and film processing.It is applied in medicine, printing and dyeing, and organic synthesis as a mordant and buffer, as well as in the dye and pharmaceutical industries.It is also used in printing and dyeing, medicine, photography, and other fields, and serves as an esterifying agent and preservative.