CHEMICAL DATA OR PROPERTIES

CHEMICAL DATA OR PROPERTIES

Phosphoric acid is chemically quite inactive at room temperature. At high temperature phosphoric acid is fairly reactive towards most metals. It has a potentially violent reaction with sodium tetrahydroborate. It react with chlorides + S.S. to form explosive hydrogen gas. It also forms explosive mixture with nitromethane.

0-phosphoric acid is a tri-basic acid. Strong as regards the first dissociation. Moderable weak as regard the second and -very weak as regard the third. Pure a 100 % 0-H₃P0₄ is a white crystalline solid (monoclin) that melts at much lower temperature.

Phosphoric acid is chemically quite inactive at room temperature. At high temperature phosphoric acid is fairly reactive towards most metal and their oxides. In oil solution phosphoric acid has pleasingly sour taste, which is similar but distinguishable from that other food acids such as citric acid, tartaric acid, lactic acid, and acetic acid. If is not volatile. It is toxic by ingenction. It is irritant to skin and eyes. It is not combustible. Vapour pressure of H₃P0₄ solution (mm Hg).