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SODIUM TETRABORATE
ICSC: 1229
Peer-Review Status: 24.10.1995 Validated
Sodium biborate
Sodium pyroborate
Boron sodium oxide
Fused borax 
CAS #: 1330-43-4 RTECS #: ED4588000
EINECS #: 215-540-4
 		    Formula: Na2B4O7
Molecular mass: 201.3

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   PREVENT DISPERSION OF DUST!   
Inhalation Cough. Shortness of breath. Sore throat. Nosebleeds.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin Dry skin. Redness.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety spectacles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Diarrhoea. Nausea. Vomiting. Weakness.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL
 		PACKAGING & LABELLING
Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations. Personal protection: P2 filter respirator for harmful particles.   
EC Classification
 
UN Classification
 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong oxidants. Dry. Well closed. 

IMPORTANT DATA
Physical State; Appearance
ODOURLESS HYGROSCOPIC WHITE POWDER OR GLASS-LIKE PLATE. TURNS OPAQUE ON EXPOSURE TO AIR. 

Physical dangers
 

Chemical dangers
Decomposes on heating and on burning. This produces toxic fumes including sodium oxide. Reacts with strong oxidants. 

Occupational exposure limits
TLV: 2 mg/m³ as TWA; 6 mg/m³ as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2008). 

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, especially if powdered. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. Ingestion at high doses could cause effects on the central nervous system, kidneys and gastrointestinal tract. Exposure through damaged skin could cause effects on the central nervous system, kidneys and gastrointestinal tract. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the respiratory tract. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at 1575°C
Melting point: 741°C
Relative density (water = 1): 2.367
Solubility in water, g/100ml at 20°C: 2.56   		 

NOTES
Rasorite 65 is a trade name.
Card has been partially updated in February 2009: see Occupational Exposure Limits. 

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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    See Also:
       Toxicological Abbreviations