218 On the action of peroryd of Manganese on uric acid. 
Arr, XXI.— Note on the action of peroxyd of manganese upon uric 
acid; by C. GILBERT WHEELER. 
THE oxydizing action of the peroxyds upon organie sub- 
stances varying to some extent according to the peroxyd em- 
ployed, I have investigated the action of peroxyd of manganese 
upon uric acid, 
If uric acid and peroxyd of manganese are heated together 
with a like quantity of water and sulphuric acid is added in 
small portions at a time until no further action is to be observed, 
the black pasty mass then filtered, and the filtrate evaporated 
to about one-fourth of its original volume, there is obtal 
after considerable time, a quantity of large hexagonal erystals, 
which by analysis and charaeteristic reactions was found to be 
parabanic acid. 
If uric acid is heated with a large quantity of water only, 
gave with chlorid of mercury no ete while tees) ei 
ing the nitrate of the 54 
as eV 
95 grams yielded on combustion 0133 water and 0:398 
i¢ acid; which relation indicated the substance t0 
allantoin. 
Found. : ‘ 
© 30°18 304. 
K 4:09 2°83 
The mother-liquor contained much urea, also an amorphous 
am nee; the quantity of which was too trifling to admit of am 
oy The action of the peroxyd of manganesé may be 
plained by the following exquation. 
3(CioH,.N,O,)+6Mn0.+8HO=2(0,H,N,0,)+2(0,0,H.N2) 
1 aoe s MnO, C,0,)+2(Mn0, CO,). es 
d is heated with peroxyd of manganese in the 
ence of but a small quantity of w ei d ureh =f 
oxalic and carbonie ac; antity of water there is a fallax: | 
tion id resem” 
