Sodium Azide

NaN₃

IUPAC: Sodium azide

CAS: 26628-22-8

Aperçu

Sodium azide is a white crystalline salt that decomposes rapidly when heated, producing nitrogen gas. This property makes it the primary propellant in automotive airbags — when a collision is detected, an electric spark ignites sodium azide, inflating the airbag with N₂ in milliseconds.

Composition

Élément Symbole Atomes Masse atomique
Nitrogen N 3 14,0070
Sodium Na 1 22,9900

Composition élémentaire

N
Nitrogen ×3
64,6%
Na
Sodium ×1
35,4%

Usages

  • • Automotive airbag propellant
  • • Biocide in hospitals and laboratories
  • • Preservative in stock solutions
  • • Synthesis intermediate

Le saviez-vous

  • ✦ A typical driver's airbag contains about 50-80 g of sodium azide

Sécurité

  • ⚠ Highly toxic if ingested
  • ⚠ Produces toxic HN₃ with acids
  • ⚠ Explosive when heated or shocked

Structure

SMILES

[N-]=[N+]=[N-].[Na+]

Propriétés

Type
salt
État
solid
Masse molaire
65,01 g/mol
Densité
1,8460 g/cm³
Point de fusion
275,0 °C
Solubilité
417 g/L at 17°C

Molecular Descriptors

Exact Mass
64,9990
TPSA
3,0 Ų
H-Bond Donors
0
H-Bond Acceptors
2
Rotatable Bonds
0
Heavy Atoms
4
Complexity
15,0

Aussi connu sous le nom de

Sodium azide

Composés associés

Diammonium Phosphate

(NH₄)₂HPO₄

Ammonium Chloride

NH₄Cl

Barium Chloride

BaCl₂

Cadmium Sulfide

CdS

Calcium Sulfate

CaSO₄

Cerium(III) Chloride

CeCl₃

Copper(II) Sulfide

CuS

Ammonium Sulfate

(NH₄)₂SO₄

Ammonium Bicarbonate

NH₄HCO₃

Calcium Propionate

Ca(C₂H₅COO)₂

Frequently Asked Questions

What is Sodium Azide?
Sodium Azide (NaN₃) is a salt compound with the IUPAC name Sodium azide.
What is the molecular weight of Sodium Azide?
Sodium Azide has a molar mass of 65.01 g/mol.
What state is Sodium Azide at room temperature?
Sodium Azide is a solid at room temperature.
Is Sodium Azide organic or inorganic?
Sodium Azide is classified as an inorganic compound.
What elements make up Sodium Azide?
Sodium Azide (NaN₃) is composed of Nitrogen (N), Sodium (Na).