Ammonium acetate
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| Ammonium acetate | |
|---|---|
 |
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| General | |
| Systematic name | Ammonium acetate |
| Other names | ? |
| Molecular formula | CH3COONH4 |
| Molar mass | 77.0825 g/mol |
| Appearance | White solid or colorless transparent crystals |
| CAS number | [631-61-8] |
| Properties | |
| Density and phase | 1.07 g/cm³, solid |
| Solubility in water | 148 g/100 ml (4 °C) |
| Melting point | 112 °C (? K) |
| Boiling point | Decomposes |
| Acidity (pKa) | ? |
| Basicity (pKb) | ? |
| Chiral rotation [α]D | ?° |
| Viscosity | ? cP at ?°C |
| Structure | |
| Crystal structure | orthorhombic |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | ? |
| NFPA 704 | |
| Flash point | ?°C |
| R/S statement | R: ? S: ? |
| RTECS number | ? |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | ? |
| Other cations | ? |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Ammonium acetate is CH3COONH4. This salt is derived from the reaction of ammonia and acetic acid.
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- CH3COOH + NH3 → CH3COONH4
It is widely available commercially.
Contents |
[edit] Uses and distinctive properties
As the salt of a weak acid and a weak base, ammonium acetate has a number of distinctive properties.
- CH3COONH4 is occasionally employed as a biodegradable de-icing agent.
- It is often used with acetic acid to create an 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.
[edit] Properties
CH3COONH4 is hygroscopic. It decomposes easily at elevated temperatures into acetamide.
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- 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.
[edit] References
- G. Jones, Organic Reactions, 1967, volume 15, 204ff (the Knoevenagel Reaction)
