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orthophosphoric acid or·tho·phos·phor·ic acid (ôr'thō-fŏs-fôr'ĭk)
See phosphoric acid.
(H3PO4), the most important oxygen acid of phosphorus, used to make phosphate salts for fertilizers. It is also used in dental cements, in the preparation of albumin derivatives, and in the sugar and textile industries. It serves as an acidic, fruitlike flavouring in food products