Saturated ("0.880") solutions can develop a significant pressure inside a closed bottle in warm weather, and the bottle should be opened with care this is not usually a problem for 25% ("0.900") solutions.Īmmonia solutions should not be mixed with halogens, as toxic and/or explosive products are formed. The ammonia vapour from concentrated ammonia solutions is severely irritating to the eyes and the respiratory tract, and these solutions should only be handled in a fume hood. S-Phrases: (S1/2), S16, S36/37/39, S45, S61. Dilute ammonia solution Standard Colour Dilute 2.0 ml of standard iron solution with 40 ml DW in a Nessler cylinder.Add 2 ml of a 20 w/v solution of iron-free citric acid and 0.1 ml of thioglycollic acid, mix, make alkaline with iron-free ammonia solution, dilute to 50 ml with DW and allow to stand for 5 minutes.
The European Union classification of ammonia solutions is given in the table. First Aid For Ammonia Solution (NH 4 OH) Emergency Overview. A 25% (by weight) solution has a density of 0.907 g/cm3, and a solution that has a lower density will be more concentrated.
The hazards of ammonia solutions depend on the concentration: "dilute" ammonia solutions are usually 5–10% by weight (25% by weight.