494 Canadian Record of Science. 
Dinitio-diactyl-tolidin. 
Diacetyl tolidin is easily nitrated when added in small 
quantities to fuming nitric acid, and the violence of the 
reaction moderated by surrounding the flask with ice cold 
water and maintaining a large exvess of nitric acid. The 
mixture is then poured into a long beaker filled with 
snow and the precipitated nitro body filtered and washed. 
It is insoluble in alcohol, water and the usual media, but 
may be, like diactyl tolidin, purified by precipitation from 
solution in boiling nitro benzol. This compound, at first of 
a brown tint, can be obtained almost white by repeated re- 
crystallization. It does not melt, and when an attempt was 
made to purify by sublimation it exploded violently. 
On combustion it yielded the following data :— 
Calculated for C,, Hy, N, O; 
Theory. Found. 
C = 55.96 55.73 
H= 4.66 4 82 
Ne Wag ees GeO 
O = 24.87 se0e ou00 
These results are in conformity with the formula :— 
CH, 
C, Hy, O 
vo,—d ee Nes 
| { H 
NO,—Cle ENA 
CH, 
Dinitro-tolidin. 
When the body above described is saponified by pro- 
longed boiling with strong caustic potash a red compound 
results, which from a large volume of boiling dilute alcohol 
may be obtained in garnet red tabular crystals which melt 
at 265° and explode on heating to a higher temperature. It 
is with difficulty dissolved in any ordinary solvent. 
It yielded on analysis the following results :— 
Calculated for C\, H,, N, O, 
Theory. Found. 
It, Il. 
C = 55.63 55.87 
H= 4.65 4.91 
N=1854 Malti 
O = 21.16 eecce eocoo 
