Sodium azide

Sodium azide
Names
IUPAC name
Sodium azide
Other names
Sodium trinitride
Smite
Azium
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.043.487 Edit this at Wikidata
EC Number
  • 247-852-1
RTECS number
  • VY8050000
UNII
UN number 1687
  • InChI=1S/N3.Na/c1-3-2;/q-1;+1 checkY
    Key: PXIPVTKHYLBLMZ-UHFFFAOYSA-N checkY
  • InChI=1/N3.Na/c1-3-2;/q-1;+1
    Key: PXIPVTKHYLBLMZ-UHFFFAOYAH
  • [N-]=[N+]=[N-].[Na+]
Properties
NaN3
Molar mass 65.0099 g/mol
Appearance Colorless to white solid
Odor Odorless
Density 1.846 g/cm3 (20 °C)
Melting point 275 °C (527 °F; 548 K) violent decomposition
38.9 g/100 mL (0 °C)
40.8 g/100 mL (20 °C)
55.3 g/100 mL (100 °C)
Solubility Very soluble in ammonia
Slightly soluble in benzene
Insoluble in diethyl ether, acetone, hexane, chloroform
Solubility in methanol 2.48 g/100 mL (25 °C)
Solubility in ethanol 0.22 g/100 mL (0 °C)
Acidity (pKa) 4.8
Structure
Hexagonal, hR12[1]
R-3m, No. 166
Thermochemistry
76.6 J/mol·K
70.5 J/mol·K
21.3 kJ/mol
99.4 kJ/mol
Hazards
GHS labelling:
GHS01: Explosive GHS06: Toxic GHS08: Health hazard GHS09: Environmental hazard
Danger
H300, H310, H410
P260, P280, P301+P310, P501 [2]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxideSpecial hazards (white): no code
4
1
3
Flash point 300 °C (572 °F; 573 K)
Lethal dose or concentration (LD, LC):
27 mg/kg (oral, rats/mice)[1]
NIOSH (US health exposure limits):
PEL (Permissible)
None[3]
REL (Recommended)
C 0.1 ppm (as HN3) [skin]
C 0.3 mg/m3 (as NaN3) [skin][3]
IDLH (Immediate danger)
N.D.[3]
Safety data sheet (SDS) ICSC 0950
Related compounds
Other anions
Sodium cyanide
Other cations
Potassium azide
Ammonium azide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Sodium azide is an inorganic compound with the formula NaN3. This colorless salt is the gas-forming component in some car airbag systems. It is used for the preparation of other azide compounds. It is an ionic substance, is highly soluble in water, and is acutely poisonous.[5]

  1. ^ a b Stevens E. D.; Hope H. (1977). "A Study of the Electron-Density Distribution in Sodium Azide, NaN
    3
    "
    . Acta Crystallographica A. 33 (5): 723–729. doi:10.1107/S0567739477001855.
  2. ^ "Sodium azide".
  3. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0560". National Institute for Occupational Safety and Health (NIOSH).
  4. ^ "Material Safety Data Sheet" (PDF). Sciencelab.com. November 6, 2008. Archived from the original (PDF) on March 4, 2016. Retrieved October 26, 2015.
  5. ^ Cite error: The named reference Ull was invoked but never defined (see the help page).