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DISODIUM HYDROGEN PHOSPHATEICSC: 1129
Disodium orthophosphate
Dibasic sodium phosphate
April 2006
CAS #: 7558-79-4
EC Number: 231-448-7

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.        In case of fire in the surroundings, use appropriate extinguishing media.   

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation 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 CLASSIFICATION & 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. 

According to UN GHS Criteria

WARNING
Causes mild skin irritation
Causes eye irritation 

Transportation
UN Classification
 

STORAGE
Separated from strong acids. 
PACKAGING
 
DISODIUM HYDROGEN PHOSPHATE ICSC: 1129
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: HO4PNa2
Molecular mass: 141.96
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) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
 

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

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

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
 

ENVIRONMENT
 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations
       DISODIUM HYDROGEN PHOSPHATE (JECFA Evaluation)