| IUPAC names
| Other names
|Molar mass||39.01 g/mol|
|Appearance||White or grayish solid|
|Odor|| Odorless (pure)|
Ammonia-like (in moist air)
|Density||1.39 g/cm3 (20 °C)|
|Melting point||210 °C (410 °F; 483 K)|
|Boiling point||400 °C (752 °F; 673 K)|
|Solubility||Reacts with alcohols, carboxylic acids|
|Solubility in ammonia||0.004 g/100 ml|
Std enthalpy of
|Safety data sheet||Sigma-Aldrich|
|Flash point||4.44 °C (39.99 °F; 277.59 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Sodium amide or sodamide is an inorganic compound with the formula NaNH2.
Sodium amide reacts with water to release ammonia.
- NaNH2 + H2O → NaOH + NH3
Since neutralization releases ammonia, this compound can be used for completely drying wet ammonia gas.
Sodium amide is a white or gray solid, which reacts violently with water. It is slightly soluble in liq. ammonia.
Sodium amide is sold by chemical suppliers, though it's almost impossible for the amateur chemist to get hold of it.
- Na + NH3 → NaNH2 + ½ H2
A good synthesis procedure can be found here.
- Reduce organic compounds
- Dry ammonia
- Dehydrohalogenation of halocarbons
- Cyclization reactions
- Ethylene oxide synthesis
Sodium amide is corrosive and reacts violently with water, releasing ammonia gas, which is irritant and toxic.
Sodium amide should be stored in air-tight containers, like Schlenk flasks, under inert gas, like argon and absolutely away from moisture. Ampouling is the best and safest way of storing this compound, especially for long periods of time.
Prolonged contact with air will form a yellow peroxide, which is shock-sensitive and can spontaneously detonate. Sodium amide samples which are yellow or brown in color represent a serious explosion risk.
Sodium amide can be safely neutralized by adding it in a large volume of an alcoholic solution, with small amounts of a weak acid, like acetic acid, citric acid, tartaric acid. The acid is required to neutralize the ammonia fumes, but neutralizing this compound will release lots of heat. Therefore, the neutralization solution should be cooled before using and kept cool during the said process. Do this outside.