8.22335 EMD Millipore

Sodium azide

Sodium azide for synthesis. CAS No. 26628-22-8, EC Number 247-852-1., for synthesis

Synonym: Hydrazoic azid sodium salt

  • CAS Number 26628-22-8

  • Linear Formula N₃Na

  • Molecular Weight 65.01 g/mol

  •  EC Number 247-852-1



packaging   25 kg in Plastic drum (8223359025)
bp   300 °C (1013 hPa) (rigorous decomposition)
solubility   420 g/l
density   1.85 g/cm3 (20 °C)
mp   275 °C (decomposition)
LD 50 oral   LD50 Rat 27 mg/kg
shipped in   ambient
storage temp.   Store at +15°C to +25°C.
specifications   Assay (cerimetric): ≥ 99.0 %
  Identity (ICP-OES): passes test

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Safety Information

HS Code 
2850 00 60
Hazard Statement(s) 
H300: Fatal if swallowed.
H410: Very toxic to aquatic life with long lasting effects.
EUH032: Contact with acids liberates very toxic gas.
Precautionary Statement(s) 
P273: Avoid release to the environment.
P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Storage class 
6.1A Combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials
WGK 2 water endangering
Azides can be decomposed by iodine (Cat. No. 104760) in the presence of sodium thiosulfate (Cat. No. 106513) with development of nitrogen: container D or E.
Hazard Pictogram(s) 
GHS06  GHS06
Hazard Pictogram(s) 
GHS09  GHS09
Hazard Symbols 
Dangerous for the environment  Dangerous for the environment
Hazard Symbols 
Very toxic  Very toxic
Declaration (railroad and road) ADR, RID 
UN 1687 , 6.1, II
Declaration (transport by air) IATA-DGR 
UN 1687 , 6.1, II
Declaration (transport by sea) IMDG-Code 
UN 1687 , 6.1, II, Segregation Group: 17 (Azides)
Categories of danger 
very toxic, dangerous for the environment
R Phrase 
R 28-32-50/53
Very toxic if swallowed.Contact with acids liberates very toxic gas.Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
S Phrase 
S 28-45-60-61
After contact with skin, wash immediately with plenty of soap and water.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).This material and its container must be disposed of as hazardous waste.Avoid release to the environment. Refer to special instructions/ Safety data sheets.
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