Sodium amide

Sodium amide, commonly called sodamide (systematic name sodium azanide), is the inorganic compound with the formula NaNH2. It is a salt composed of the sodium cation and the azanide anion. This solid, which is dangerously reactive toward water, is white, but commercial samples are typically gray due to the presence of small quantities of metallic iron from the manufacturing process. Such impurities do not usually affect the utility of the reagent. NaNH2 conducts electricity in the fused state, its conductance being similar to that of NaOH in a similar state. NaNH2 has been widely employed as a strong base in organic synthesis.

Sodium amide
Names
IUPAC name
Sodium amide, sodium azanide
Other names
Sodamide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.064
EC Number
  • 231-971-0
UNII
UN number 1390
  • InChI=1S/H2N.Na/h1H2;/q-1;+1 N
    Key: ODZPKZBBUMBTMG-UHFFFAOYSA-N N
  • [Na]N
  • [NH2-].[Na+]
Properties
NaNH2
Molar mass 39.013 g·mol−1
Appearance Colourless crystals
Odor Ammonia-like
Density 1.39 g/cm3
Melting point 210 °C (410 °F; 483 K)
Boiling point 400 °C (752 °F; 673 K)
Reacts
Solubility 40 mg/L (liquid ammonia), reacts with ethanol
Acidity (pKa) 38 (conjugate acid)
Structure
orthorhombic
Thermochemistry
66.15 J/(mol·K)
76.9 J/(mol·K)
-118.8 kJ/mol
-59 kJ/mol
Hazards
NFPA 704 (fire diamond)
3
2
3
W
Flash point 4.44 °C (39.99 °F; 277.59 K)
450 °C (842 °F; 723 K)
Related compounds
Other anions
 Sodium bis(trimethylsilyl)amide
Other cations
 Lithium amide
Potassium amide
Related compounds
 Ammonia
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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