;Mainly used in aluminum phosphate, audio-visual. Used to manufacture acid manganese and focus of phosphoric acid potassium. The medicine used in the manufacture of glycerol sodium phosphate, iron, manufacturing, adjust ph when penicillin zinc phosphate as dental adhesives. Plastic industry as the catalyst phenolic resin condensation. Match industry for dipping stems, and can make the burning match the match not stem and ash peat-forming, when use safer. The food industry as sour sauce.;