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POTASSIUM NITRATE
ICSC: 0184
Peer-Review Status: 15.10.2001 Validated
Saltpeter 
CAS #: 7757-79-1 RTECS #: TT3700000
UN #: 1486
EINECS #: 231-818-8
    Formula: KNO3
Molecular mass: 101.1

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.  In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION Risk of fire and explosion on contact with reducing agents.     
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
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 Abdominal pain. Blue lips, fingernails and skin. Dizziness. Laboured breathing. Confusion. Convulsions. Diarrhoea. Headache. Nausea. Unconsciousness.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Sweep spilled substance into plastic or glass containers. Wash away remainder with plenty of water.   
EC Classification
 
UN Classification
UN Hazard Class: 5.1; UN Pack Group: III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H1; F0; R0.
Transport Emergency Card: TEC (R)-51S1486. 
Separated from combustible substances and reducing agents. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-WHITE CRYSTALLINE POWDER. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This increases fire hazard. The substance is a strong oxidant. It reacts with combustible and reducing materials. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

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

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

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

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at 400°C
Melting point: 333-334°C
Density: 2.1 g/cm³
Solubility in water, g/100ml at 25°C: 35.7  
 

NOTES
Rinse contaminated clothes (fire hazard) with plenty of water.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. 

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
       POTASSIUM NITRATE (JECFA Evaluation)