it worked amazingly well. till shortly after I found out that the
Yellow vapor that was coming off the mixture and falling down to
the ground, (vapor heavier then air?) was apparently Mustard Gas…
Not from Nitric Acid - Mustard gas was Chlorine...... however, the brown gas from Nitric acid is just as toxic and is very corrosive..
The brown gas that may be emitted by concentrated or fuming nitric
acid is nitrogen dioxide, which forms nitric acid when it reacts
with water. Nitric oxide, which is colorless, is another product of
metals reacting with nitric acid. It reacts with oxygen in the air
to form nitrogen dioxide.
Mustard gas is 1,5-dichloro-3-thiapentane, infamous for its use in
WWI. Note that it contains chlorine and sulfur in its composition.
Chlorine gas was also used in WWI gas warfare.