International Chemical Safety Cards

BORON OXIDE ICSC: 0836
BORON OXIDE
Boric anhydride
Boron trioxide
Boron sesquioxide
B2O3
Molecular mass: 69.6
CAS # 1303-86-2
RTECS # ED7900000
ICSC # 0836
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


 
EXPOSURE
PREVENT DISPERSION OF DUST!

INHALATION Cough. Sore throat.
Local exhaust or breathing protection.
Fresh air, rest.
SKIN Redness.
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
EYES Redness. Pain.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION Abdominal pain. Diarrhoea. Nausea. Vomiting.
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place (extra personal protection: P1 filter respirator for inert particles).
Dry.

SEE IMPORTANT INFORMATION ON BACK
ICSC: 0836 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

BORON OXIDE ICSC: 0836

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PHYSICAL STATE; APPEARANCE:
COLOURLESS, ODOURLESS, HYGROSCOPIC, BRITTLE, VITREOUS LUMPS OR HARD WHITE CRYSTALS , WITH SLIGHTLY BITTER TASTE.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
Reacts slowly with water to form boric acid. Attacks metal in the presence of moist air.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV (as TWA): ppm; 10 mg/m3 (ACGIH 1995-1996).


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 nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract.


PHYSICAL
PROPERTIES
 Boiling point: about 1860°C
Melting point: about 450°C
 Relative density (water = 1): 2.46 (cryst); 1.8 (amorph)
Solubility in water: moderate
ENVIRONMENTAL
DATA
N O T E S
Also consult ICSC # 0991 (Boric acid).
ADDITIONAL INFORMATION


ICSC: 0836 BORON OXIDE
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.