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AMMONIUM NITRATE
ICSC: 0216
Peer-Review Status: 04.10.2013 Validated
Nitric acid, ammonium salt 
CAS #: 6484-52-2 RTECS #: BR9050000
UN #: see Notes
EINECS #: 229-347-8
    Formula: NH4NO3
Molecular mass: 80.0

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire.  NO contact with combustible substances or reducing agents.  Use water in large amounts. NO other agents. In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION Risk of fire and explosion on confinement and exposure to high temperatures or when contaminated with other materials.  See Notes.  In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. 
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation Cough.  Use local exhaust or breathing protection.  Fresh air, rest. Seek medical attention if you feel unwell. 
Skin Redness.  Protective gloves.  Rinse skin with plenty of water or shower. Remove contaminated clothes. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Vomiting. Diarrhoea. Blue lips, fingernails and skin. Weakness.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered non-combustible containers. Store and dispose of according to local regulations. Wash away remainder with plenty of water.   
EC Classification
 
UN Classification
UN Hazard Class: 5.1; UN Pack Group: III 
GHS Classification
Signal: Warning
May intensify fire; oxidizer
May be harmful if swallowed
Causes skin irritation
Causes serious eye irritation
May cause damage to blood 
flam circleexcl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H0; F0; R3; OX.  Separated from combustible substances and reducing agents. Dry. Well closed. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-WHITE HYGROSCOPIC SOLID IN VARIOUS FORMS. 

Physical dangers
 

Chemical dangers
Heating may cause violent combustion or explosion. Decomposes on heating. This produces toxic fumes. The substance is a strong oxidant. It reacts with acids and combustible and reducing materials. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

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

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the blood. This may result in formation of methaemoglobin. The effects may be delayed. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at > 210°C
Melting point: 170°C
Density: 1.7 g/cm³
Solubility in water, g/100ml at 20°C: 200  
Avoid release to the environment in circumstances different to normal use. 

NOTES
UN number 1942 refers to pure ammonium nitrate with not more than 0.2% combustible material.
Ammonium nitrate can refer to a range of ammonium nitrate-based fertilizers (with UN number 2067).
The physico-chemical properties may vary according to the chemical composition.
This ICSC covers pure ammomium nitrate - the properties of fertilizers will be different.
Becomes shock-sensitive when mixed with organic materials.
Rinse contaminated clothing with plenty of water because of fire hazard.
Depending on the degree of exposure, periodic medical examination is suggested.
The storage of pure ammonium nitrate is often regulated - check for local regulations.
In the event of a fire, large piles of ammonium nitrate present an explosion hazard. Large piles might need to be dismantled. 

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
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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