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DISODIUM HYDROGEN PHOSPHATE
ICSC: 1129
Peer-Review Status: 05.04.2006 Validated
Disodium orthophosphate
Dibasic sodium phosphate 
CAS #: 7558-79-4 RTECS #: WC4500000
EINECS #: 231-448-7
 		    Formula: HO4PNa2
Molecular mass: 141.96

TYPES OF
HAZARD /
EXPOSURE 		ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE      
Inhalation Cough. Cough. Sore throat.  Use ventilation.  Fresh air, rest. 
Skin Redness. Pain.  Protective gloves.  Rinse skin with plenty of water or shower. 
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. Diarrhoea.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. 

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.   
EC Classification
 
UN Classification
 
GHS Classification
Signal: Warning
Causes mild skin irritation
Causes eye irritation 

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong acids. 

IMPORTANT DATA
Physical State; Appearance
WHITE OR COLOURLESS HYGROSCOPIC CRYSTALS OR POWDER. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic fumes. Reacts violently with strong acids. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of short-term exposure
The substance is mildly irritating to the eyes, skin and respiratory tract. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at ~250°C
Density: 0.5-1.2 g/cm³
Solubility in water, g/100ml at 20°C: 7.7
Octanol/water partition coefficient as log Pow: -5.8 (calculated)  		 

NOTES
 

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
       DISODIUM HYDROGEN PHOSPHATE (JECFA Evaluation)