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BORON OXIDE
ICSC: 0836
Peer-Review Status: 11.04.2014 Validated
Boric anhydride
Boron trioxide
Boron sesquioxide
Diboron trioxide
CAS #: 1303-86-2 RTECS #: ED7900000
EC #: 005-008-00-8
EINECS #: 215-125-8
    Formula: B2O3
Molecular mass: 69.6

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Not combustible.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST! STRICT HYGIENE!   
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness.  Protective gloves. Protective clothing.  Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety spectacles or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Nausea. Vomiting. Abdominal pain. Diarrhoea. Headache. Drowsiness. Convulsions.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. 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 containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.   
EC Classification
R: 60-61; S: 53-45; Symbol: T 
UN Classification
 
GHS Classification
Signal: Danger
Causes serious eye irritation
May cause respiratory irritation
May damage fertility or the unborn child 
excl mark;warncancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
  Dry. Well closed. 

IMPORTANT DATA
Physical State; Appearance
WHITE HYGROSCOPIC POWDER OR GRANULES 

Physical dangers
 

Chemical dangers
Attacks metal in the presence of moist air. This produces hydrogen. This generates fire and explosion hazard. 

Occupational exposure limits
TLV: 10mg/m³ as TWA; (ACGIH 2014).
MAK (not established): (DFG 2013). 

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 , 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 central nervous system and kidneys. This may result in impaired functions. 

Effects of long-term or repeated exposure
The substance may have effects on the upper respiratory tract. Animal tests show that this substance possibly causes toxicity to human reproduction or development. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: ~1860°C
Melting point: 450°C
Relative density (water = 1): 2.46 (cryst)
Relative density (water = 1): 1.8 (amorph)
Solubility in water, g/l at 25°C: 36 (moderate) 
 

NOTES
See also ICSC 0991 (Boric acid). 

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
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    See Also:
       Toxicological Abbreviations