IPCS INCHEM Home
SODIUM AZIDE
ICSC: 0950
Peer-Review Status: 11.04.2014 Validated
Hydrazoic acid, sodium salt
Azide
Azium
CAS #: 26628-22-8 RTECS #: VY8050000
UN #: 1687
EC #: 011-004-00-7
EINECS #: 247-852-1
    Formula: NaN3
Molecular mass: 65.0

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO contact with acids or heavy metals.  Use dry sand, special powder. 
EXPLOSION Risk of fire and explosion on contact with acids or metals. Heating will cause rise in pressure with risk of bursting.  Do NOT expose to heat, friction or shock.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   PREVENT DISPERSION OF DUST! STRICT HYGIENE!   
Inhalation Cough. Headache. Nasal congestion. Fall in blood pressure. Shortness of breath. See Notes.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer immediately for medical attention. 
Skin   Protective gloves.  Rinse skin with plenty of water or shower. Seek medical attention if you feel unwell. 
Eyes Redness. Pain.  Wear safety spectacles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Nausea. Sweating. Fall in blood pressure. Increased heart rate. Weakness. Blurred vision. Shock or collapse. See Effects of short-term exposure  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer immediately for medical attention. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered plastic containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: T+, N; R: 28-32-50/53; S: (1/2)-28-45-60-61 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: II 
GHS Classification
Signal: Danger
Fatal if swallowed
Causes eye irritation
May cause respiratory irritation
May cause damage to cardiovascular system
Very toxic to aquatic life 
skull;toxiccancer;health hazenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
  Separated from food and feedstuffs, acids and metals. See Chemical Dangers. Provision to contain effluent from fire extinguishing. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS HEXAGONAL CRYSTALS. 

Physical dangers
See Notes. 

Chemical dangers
Decomposes on heating above 275°C . This produces toxic fumes. This generates fire and explosion hazard. Reacts with copper, lead, silver, mercury and carbon disulfide. This produces particularly shock-sensitive compounds. Reacts with acids. This produces toxic and explosive hydrogen azide. See Notes. 

Occupational exposure limits
TLV: 0.29mg/m³ (ceiling value); A4 (not classifiable as a human carcinogen); (ACGIH 2014).
EU OEL: 0.1 mg/m³ as TWA; 0.3 mg/m³ as STEL; (skin); (EU 2000). 

Routes of exposure
The substance can be absorbed into the body by inhalation and by ingestion. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered. 

Effects of short-term exposure
The substance is mildly irritating to the eyes and upper respiratory tract. The substance may cause effects on the cardiovascular system and central nervous system. This may result in lowering of blood pressure, cardiac disorders and central nervous system disorders. Ingestion of large amounts could cause death. Inhalation of dust may cause asthma-like reactions (RADS). 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at 275°C
Relative density (water = 1): 1.85
Solubility in water, g/100ml at 17°C: 41.7 (good)
Vapour pressure, Pa at 20°C: 1  
The substance is very toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
In presence of heat, acids and water sodium azide is readily transformed to hydrazoic acid, the vapour of which may be present whenever the salt is handled.
Inhalation of high concentrations of hydrazoic acid may cause severe respiratory irritation including lung oedema.
Decomposition of sodium azide produces large amount of gases. This generates explosion hazard in confined spaces. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations