Sources
open directory project
Help build the largest human-edited directory on the web.
Submit a site - Become an editor
Wikipedia. Licensed under the GNU Free Documentation License.
Are you an expert in this subject? Join the discussion and share your knowledge at Wikipedia.org.
Ammonium acetate
From Wikipedia, the free encyclopedia
| Ammonium acetate | |
|---|---|
 |
|
| 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 |
|
Ammonium acetate is CH3COONH4. This salt is derived from the reaction of ammonia and acetic acid.
-
- CH3COOH + NH3 → CH3COONH4
It is widely available commercially.
Contents |
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.
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.
- G. Jones, Organic Reactions, 1967, volume 15, 204ff (the Knoevenagel Reaction)