fluffy bunny - 1-6-2003 at 20:45
I have left my lab unnatended for a couple of months, and some nitrobenzene which was being stored there, has gone from a very dark yellow colour, to
a clear, light yellow colour. Could anyone tell me what it is now? How it has decomposed?
More importantly, can anyone suggest how i could dispose of it, as i do not need it anymore? It's quite toxic, so i can't exactly just pour
it in the garden 
so what should i do with it?
Thanks in advance.
FrenchPyro - 1-6-2003 at 23:02
Pour it in your piano. 
The questions are prepared by what,
recrystallized from what
and how long stored.
a_bab - 2-6-2003 at 08:54
Nitrobenzene is yellow. Maybe due to the long time pause, the impurities (dissolved NO2) had dissapeared.
In order to dispose it, soak a newspaper with it and light it. Stay away from the fumes. Simple and safe...
fluffy bunny - 5-6-2003 at 02:19
thankyou for the suggestion a_bab, i'll try that....
However i had the conception that nitrobenzene was a dark thick yellow colour (as it was before), rather then the light translucent yellow it is
now.... However maybe it was just NO2, etc in the solution darkening it.
Frenchpyro, it was prepared by the common reaction of nitric/sulfuric acid with benzene. Recrystallized? It's a liquied 
And i didn't really purify it at all, which may be the reason it was originally dark, and has since lost colour.....
And i don't have a piano.....