Φωσφορικό οξύ

Το φωσφορικό οξύ είναι ένα ανόργανο οξύ με χημικό τύπο $H_{3}PO_{4}$ ^[1]. Το οξύ αυτό είναι ιδιαίτερα δραστικό και παράγεται με αντίδραση του νερού ${\ce {(H2O)}}$ με οξείδιο του φωσφόρου ${\ce {(P2O5)}}$ . Το φωσφορικό οξύ διαλύεται στο νερό παράγοντας κατιόντα υδρογόνου $H^{+}$ και φωσφορικές ρίζες $(PO_{4})^{-3}$ , ενώ αντιδρά με βάσεις παράγοντας φωσφορικά άλατα.

Ο κωδικός του φωσφορικού οξέος στον ευρωπαϊκό κώδικα τροφίμων και συντηρητικών είναι Ε338.

Οι φωσφορικές ρίζες συμμετέχουν στη σύσταση του δεοξυριβονουκλεϊκού οξέος (DNA) στη σύνδεση των νουκλεοτιδίων. Αποτελεί συστατικό φρούτων και λαχανικών, ενώ χρησιμεύει στον οργανισμό ως αντιοξειδωτικό και δεσμευτικό μετάλλων^[2]. Επίσης, είναι συστατικό μερικών συγκολλητικών ουσιών.

Παραπομπές

↑ Αθανασόπουλος, Χ.· Κουλουρά Θ. (19 Σεπτεμβρίου 1997). «ΦΩΣΦΟΡΙΚΟ ΟΞΥ» (PDF). ΔΕΛΤΙΟ ΠΛΗΡΟΦΟΡΙΩΝ ΑΣΦΑΛΕΙΑΣ. ΒΙΟΜΗΧΑΝΙΑ ΦΩΣΦΟΡΙΚΩΝ ΛΙΠΑΣΜΑΤΩΝ Α.Ε. Αρχειοθετήθηκε από το πρωτότυπο (pdf) στις 21 Μαΐου 2005. Ανακτήθηκε στις 20 Μαΐου 2010.
↑ «E338 : Φωσφορικό οξύ» (html). Wageningen University, (Ολλανδία). Ανακτήθηκε στις 20 Μαΐου 2010.

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