Used in leather tanning to lower pH and remove hair and natural fats from hides. Employed as a preservative and antibacterial agent in livestock feed, particularly in silage. Applied in textile dyeing and finishing processes to control pH and improve dye uptake. Utilized in cleaning products for descaling and removing rust and mineral deposits. Used in the production of esters for artificial flavors and fragrances. Acts as a reducing agent in some chemical synthesis processes. Used in beekeeping to control parasitic mites in honeybee colonies. Serves as a proton source in fuel cell systems.