188 Notice of some Recent [March 



Acetate ofmelamine is very soluble in water, and crystal- 

 lizes in large rectangular flexible plates. 



Phosphate of melamine is very soluble in boiling water. 

 A concentrated solution leaves, on cooling, a white mass 

 formed of needles placed concentrically. Formate of mela-. 

 mine dissolves easily and crystallizes. 



4. Ammeline. — This substance remains in solution in the 

 caustic potash when melamine is prepared. It may be 

 separated by saturating the alkali with an acid. It is best 

 to employ acetic acid, because the mineral acids dissolve 

 it in excess. Carbonate of ammonia and sal-ammoniac 

 precipitate it also from its alkaline solution. After preci- 

 pitation it should be washed and dissolved in nitric acid. 

 Concentrate the solution and long four-sided colourless or 

 slightly yellow prisms will be separated; or precipitate 

 it from its solution in nitric acid by means of caustic am- 

 monia, or carbonate of ammonia. 



Ammeline is a white shining crystallized substance when 

 precipitated by ammonia, insoluble in water, alcohol, and 

 ether, but soluble in the caustic alkalies and in most of the 

 acids. When heated it affords a crystallized sublimate 

 of ammonia, and, if the heat is carried far enough, is 

 converted into cyanogen and azote, leaving no residue. 

 Towards acids it acts as a base, but it is weaker than 

 melamine. Its salts are partially decomposed by water. 

 Ammeline, analyzed by oxide of copper, afforded 



Carbon .... 28*553 

 Azote . . . . 55-110 

 Oxygen .... 12*451 

 Hydrogen . . . 3*884 



100*000 

 Nitrate of ameline consists of 



1 atom ammeline . 16* 

 1 ,, nitric acid . 6*75 

 1 „ water. . . 1-125 



23*875 



Nitrate of ammeline affords with nitrate of silver, a pre- 

 cipitate of the same nature as that produced by melamine, 

 being white and crystalline, and consisting of one atom 



