It is the anhydride of an acid, and consequently it dissolves in fused alkalis to form silicates.
The constituents of rosin are chiefly (80-90%) abietic acid or its anhydride together with pinic and sylvic acids.
Nitric peroxide, Peroxide of nitrogen, Nitrogen tetroxide, Hyponitric anhydride.
As a matter of fact, reaction takes place at the boiling temperature of the anhydride.
This gives the total acidity due to free acetic acid and acid formed from the anhydride.
The most probable view is that it is the anhydride of sylvic acid, which is probably C20H30O2.
Antimonic or metantimonic acid, heated to a temperature below redness, loses water and yields the anhydride, Sb2O5.
Like sulphur, selenium combines with oxygen and forms an anhydride corresponding to sulphurous anhydride.
As Arsenious anhydride:—Obtained in a weighed capsule or tube, either by the crystallisation or sublimation test.
anhydride an·hy·dride (ān-hī'drīd')
A chemical compound formed from another by the removal of water.