David the evaporation point isn't what you should be asking about.
It is the vapor pressure of the ammonia/water solution that is biting
you in the butt. A solution of 30% ammonia has a room temp (25°C)
vapor pressure of approx 1 atmosphere. Below room temp the VP
is lower than 1atm and less and less ammonia will evaporate the colder
the solution is. There are 2 fixes to your problem. Heat the ammonia
solution or use a stronger solution.

For more than you ever wanted to know on this subject see
http://www.ammoniapro.com/Ammonia%20...%20Ammonia%20I
nfo%20Manual%20-LaRoche.pdf
Page 21 has the VP vs Temp chart.

HTH.

Art

"David F. Eisan" wrote in message
ble.rogers.com...
Dear All,

I opened the fuming chamber, and I didn't see any change after 12 hours. I
think it might be because it is too cold in the garage. It is about 0ºC
(freezing) in the garage today.

I DAGS, but all the MSDS sheets I found for ammonia don't have the
evaporation point listed.

I know we have a few chemists here, does anyone know the evaporation point
for ammonia?

Thanks,

David.

Every neighbourhood has one, in mine, I'm him.

Remove the "splinter" from my email address to email me.

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