Gaseous nitrogen

Camphor in nitrogen Gaseous Nitrogen (gas) Camphor (solid)... 

Oxidized nitrogen. Gaseous NO and Tc02 H20 in 4-M HBr produce a blood-red... 

Gay[Pg.188]

The evolution of nitrogen is not always entirely satisfactory as a test owing to the possible evolution of gaseous decomposition products of nitrous acid itself. The test may be performed as follows. To i ml. of chilled concentrated sodium nitrite solution add i ml. of dilute acetic acid. Allow any preliminary evolution of gas to subside, and then add the mixed solution to a cold aqueous solution (or suspension) of the amide note the brisk effervescence. 

Another important method of following protein hydrolysis is that due to Van Slyke, and consists in estimating the free amino groups liberated by treatment with nitrous acid, whereby gaseous nitrogen is evolved and measured in a special apparatus. 

Liquid diazomethane CHjjNj, b.p. —24°, is an explosive compound and explosions may also occur in the gaseous state if the substance is dry and undiluted. The gas may be handled with safety by diluting it with nitrogen. For synthetical work, a dry ethereal solution of the gas is employed and this can be handled with safety due regard must, however, be paid to the poisonous... 

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