IPCS INCHEM Home
BARIUM OXIDEICSC: 0778
October 1999
CAS #: 1304-28-5Barium monoxide
Barium protoxide
Calcined baryta
UN #: 1884
EINECS #: 215-127-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible.        In case of fire in the surroundings, use appropriate extinguishing media.   

 PREVENT DISPERSION OF DUST! STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain.  Wear safety spectacles or eye protection in combination with breathing protection if powder.  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. Muscle paralysis. Irregular heartbeat. Elevated blood pressure.  Do not eat, drink, or smoke during work.  Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Sweep spilled substance into covered containers. Carefully collect remainder. Then store and dispose of according to local regulations. Do NOT let this chemical enter the environment. Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 

STORAGE
Separated from food and feedstuffs. Dry. Well closed. 
PACKAGING
Airtight.
Do not transport with food and feedstuffs. 
BARIUM OXIDE ICSC: 0778
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
YELLOWISH-WHITE SOLID IN VARIOUS FORMS. 

Physical dangers
 

Chemical dangers
The solution in water is a medium strong base. Reacts violently with water, dinitrogen tetraoxide, hydroxylamine, sulfur trioxide and hydrogen sulfide. This generates fire and explosion hazard. 

Formula: BaO
Molecular mass: 153.3
Boiling point: ~2000°C
Melting point: 1923°C
Density: 5.7 g/cm³
Solubility in water, g/100ml at 20°C: 3.8  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the nervous system. Exposure could cause hypokalaemia. This may result in cardiac disorders and muscular disorders. Exposure could cause death. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
TLV: 0.5 mg/m3, - ppm, as TWA; A4 (not classifiable as a human carcinogen).
MAK: (as Ba): 0.5 (inhalable fraction) mg/m3; peak limitation category: II(8); pregnancy risk group: D.
EU-OEL: (as Ba): 0.5 mg/m3 as TWA 

ENVIRONMENT
The substance is harmful to aquatic organisms. 

NOTES
Reacts violently with fire extinguishing agents such as water.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 20/22; S: (2)-28; Note: A 

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.
    See Also:
       Toxicological Abbreviations