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> Ammonium acetate (crystals) (CH3COONH4) E264 1 lb
Ammonium acetate (crystals) (CH3COONH4) E264 1 lb
Ammonium acetate is a chemical compound with the formula CH3COONH4 (or C2H4O2.NH3 or C2H7NO2). It is a solid, which can be derived from the reaction of ammonia and acetic acid.
Uses and distinctive properties
As the salt of a weak acid and a weak base, ammonium acetate has a number of distinctive properties.
* NH4C2H3O2 is occasionally employed as a biodegradable de-icing agent.
* It is often used with acetic acid to create a buffer solution, one that can be thermally decomposed to non-ionic products
* Ammonium acetate is useful in the Knoevenagel condensation in organic synthesis.
* It is relatively unusual example of a salt that melts at low temperatures.
* Can be used with distilled water to make a protein precipitating reagent.
* Is often used as an aqueous buffer for ESI mass spectrometry of proteins and other molecules.
Ammonium acetate is volatile at low pressures. Because of this it has been used to replace cell buffers with non-volatile salts, in preparing samples for mass spectrometry. [2] Other volatile salts which have been used for this include ammonium formate.
CH3COONH4 is hygroscopic. It decomposes easily at elevated temperatures into acetamide.
CH3COONH4 CH3C(O)NH2 + H2O
In this reaction, a salt is converted to two molecular species, which is a relatively uncommon conversion at mild temperatures.
