Title: Phosphoric Acid, Meta

CAS Registry Number: 37267-86-0

CAS Name: Metaphosphoric acid

Additional Names: glacial phosphoric acid

Literature References: (HPO3)n; H 1.26%, O 60.01%, P 38.73%.

Properties: Transparent, glass-like solid or soft silky masses; hygroscopic. Volatilizes at red heat. Very slowly sol in cold water, slowly changing to H3PO4, the change is hastened by boiling; sol in alcohol. Keep tightly closed. For greater convenience it is also marketed in form of rods made by the addition of sodium phosphate.

Use: In dentistry for making zinc oxyphosphate cement; as reagent in chemical analysis.