Ammonium acetate

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Ammonium acetate
Ammonium acetate bottle and sample.jpg
Names
IUPAC name
Ammonium ethanoate
Systematic IUPAC name
Ammonium acetate
Other names
Azanium acetate
Identifiers
Jmol-3D images Image
Properties
CH3COONH4
C2H7NO2
Molar mass 77.08 g/mol
Appearance Deliquescent white solid
Odor Acetic
Melting point 110–114 °C (230–237 °F; 383–387 K) (Decomposes)
Boiling point 117.1 °C (242.8 °F; 390.2 K) (At 760 mmHg, decomposes)
102 g/100 mL (0 °C)
148 g/100 mL (4 °C)
143 g/100 mL (20 °C)
533 g/100 mL (80 °C)
Solubility Soluble in acetone, ammonia, ethanol, sulfur dioxide
Solubility in methanol 7.89 g/100 mL (15 °C)
131.24 g/100 g (94.2 °C)
Solubility in dimethylformamide 0.1 g/100 g
Thermochemistry
−615 kJ/mol
Hazards
Safety data sheet ScienceLab
Flash point 136 °C
Lethal dose or concentration (LD, LC):
386 mg/kg (mice, intravenous)
Related compounds
Related compounds
Ammonium formate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Ammonium acetate is a chemical compound with the formula NH4CH3COO (sometimes written as CH3COONH4).

Properties

Chemical

Ammonium acetate decomposes at temperatures above 165 °C to yield acetamide:

CH3COONH4 → CH3C(O)NH2 + H2O

If heated further, it will convert to acetonitrile (methyl cyanide).

Physical

Ammonium acetate is a white hygroscopic solid. Ammonium acetate is volatile at low pressures and has a vinegar-like smell.

Availability

Ammonium acetate can be purchased online cheaply.

Preparation

Ammonium acetate can be prepared by reacting acetic acid with ammonia, ammonium bicarbonate or carbonate. Drying the solution by boiling the excess water is difficult, as ammonium acetate will decompose. The best way to synthesize it is to bubble ammonia gas into anhydrous (glacial) acetic acid, causing the ammonium acetate to crystallize, though this is expensive.

Projects

Handling

Safety

Ammonium acetate is non-toxic, though if heated it can generate acetamide which is considered carcinogenic.

Ammonium acetate is hygroscopic and will slowly hydrolyze to yield acetic acid, which is irritant and corrosive in large quantities.

Storage

Ammonium acetate should be stored in dry sealed containers, as it's hygroscopic.

Disposal

Ammonium acetate is a harmless source of nitrogen to organic life and can be discarded without any special treatments.

References

Relevant Sciencemadness threads