Phosphoric acid ne na biyu kawai ga sulfuric acid a matsayin masana'antu acid kuma akai-akai yana darajanta manyan sinadarai 10 da ake amfani da su a duniya. Jihohi, amma ana amfani da shi a cikin wasu aikace-aikace.An yi amfani da Phosphates azaman magini da masu laushin ruwa.Maginin wani abu ne da aka ƙara a cikin sabulu ko wanka don ƙara ƙarfin tsarkakewa.
Ana amfani da acid phosphoric a matsayin tsaka-tsaki a cikin samar da kayan abinci na dabba, sinadarai masu kula da ruwa, jiyya na saman karfe, wakilin etching, da samfuran kulawa na sirri kamar man goge baki.Ana amfani da shi azaman mai kara kuzari a cikin masana'antar man fetur da polymer.Ana amfani da phosphoricacid a cikin abinci azaman mai kiyayewa, acidulant, da haɓaka dandano;yana acidified carbonateddrinks irin su Coca Cola da Pepsi, yana ba su dandano mai daɗi.Ana amfani da acid phosphoric azaman mai cire tsatsa da tsabtace ƙarfe.Jelly na Naval kusan 25% phosphoric acid ne.Sauran abubuwan da ake amfani da su na acid phosphoric sun haɗa da sarrafa haske a cikin samar da gilashi, rini na yadi, latexcoagulation na roba, da siminti na hakori.
Phosphoric acid (H3PO4) shine mafi mahimmancin oxoacid na phosphorus kuma babban amfani da shi shine wajen kera takin zamani.
A cikin jikin mutum, phosphate shine babban abin da ke dauke da phosphorus.Phosphate wani fili ne na inorganic kuma shine gishiri na phosphoric acid.Zai iya samar da esters na kwayoyin halitta tare da nau'ikan mahadi kuma waɗannan suna da mahimmanci a yawancin matakai na biochemical.Phosphate yana da ma'auni mai mahimmanci PO43-.Kwayoyin tetrahedral ne, inda atom ɗin phosphorus na tsakiya ke kewaye da ƙwayoyin oxygen guda huɗu.
A cikin tsarin nazarin halittu, ana samun phosphate sau da yawa ko dai a matsayin ion kyauta (inorganic phosphate) ko a matsayin ester bayan amsawa tare da mahadi na kwayoyin halitta (sau da yawa ana kiransa kwayoyin phosphates).Inorganic phosphate (mafi yawanci ana kiranta da Pi) cakuɗe ne na HPO42- da H2PO4- a pH na jiki.