I need to use a saturated solution of ammonia in Meoh (approx 7M). Is there any alternative to just bubbling ammonia in anhydrous MeOH until saturation (which requires an ammonia cylinder)?
Often used is the process of gently heating aqueous ammonia and running the gas through a KOH drying tube into the solution. Some suck-back will likely occur so a suck-back trap would be a good idea. Also, make sure to cool the methanol in an ice bath so the ammonia will not escape so easily.
Otherwise, you could use a similar setup, but create ammonia by reaction of NH4SO4 and NaOH and drying this gas as above.
From my experience: if it is for research purposes and you need it really dry, the best choice is to buy it from Aldrich or any other supplier. Another way for lab work use is to condense it over cooled methanol (
Dear Colleagues,
Thank you for the answers. I am actually looking for a replacement, not for an alternative source or an alternative way to making it. I have made today almost 100 mL solution with anhydrous MeOH and dry NH3 from a cilinder (passed through KOH pellets) at low temp.
I have seen reports using amminium carbonate in the reaction from which amonia gas liberates while heating that will be readily available for desired reaction if your system allows you to have salts within the reaction mixture, which can be removed subsequently by filteration after reaction is complete.
I have seen reports using ammonium carbonate in the reaction from which amonia gas liberates while heating that will be readily available for desired reaction if your system allows you to have salts within the reaction mixture, which can be removed subsequently by filteration after reaction is complete.
It would be helpful to know, what kind of reaction you would like to do...
The another source for ammonia is ammonium acetate or urea fusion with compd. to be reacted.
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