208 J. Maier on Hippuric Acid. 
Art. XXIV.—Action of Binoxyd of Lead and Sulphuric Acid on 
Hippuric Acid; by Dr. Jutius Mater, Chemical Assistant, 
School of Mines, Columbia College. Soin 
and the mass congeals to a thick paste. This is placed on 4 
filter, and washed with a dilute soda solution till the wash-water 
shows no further reaction of sulphuric acid. This massis treated 
with alcohol, which dissolves the hipparaffin, and evaporated in 
a water-bath to one-half its volume. On cooling, the entire 
liquid congeals to a crystalline mass. The separated hippara 
is collected on a filter, and washed with boiling water, until all 
acid reaction has disappeared, and is then redissolved in hot ale 
ammonia only after continued fusing with caustic see and 
’ L_Paee 
is not separated from this solution by water. Fuming nitrie 
j di . ‘ A 
heated in a stream of chlorhydric acid gas, a colorless oil De 
ever, which eongeals to a crystalline mass. Schwarz, 
described hipparaffin gave it the incorrect formula ©, ,Hs° 
I found its composition to be €,H,N®, the formation of 
Hippuricacid. Binoxyd Sulphuric —_Hipparaffin. Carbonic Sulphate of bisce 
- acid i lead. 
ead. 3 acid. - 
€ gH NO, + PbO, 182H20,=C,H,NOTEH,8 stSePb,0. +H? : 
Hipparin, ©,H,NO.. ie 
_ When an excess of sulphuric acid is used in the pee pes 
of hipparaffin, an oily liquid is separated which rises t0 t an 
‘ace of the alcoholic solution, and on cooling congeals pee j 
_ f@ailine mass, on the addition of water. This mass sued” a 
hot water, and crystallizes in long, white, glassy needles, eae 
dn the shape of fans. These needles melt at 49° C., and become 
8 Schwarz Aonal., Ixxv, 201. : 
ge 
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