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BARIUM OXIDE ICSC: 0778
Date of Peer Review: October 1999

Barium monoxide
Barium protoxide
Calcined baryta
CAS # 1304-28-5 BaO
RTECS # CQ9800000 Molecular mass: 153.3
UN # 1884
EC # 056-002-00-7
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible.

In case of fire in the surroundings: NO water.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!

Inhalation Cough. Sore throat.
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.
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 take to a doctor.
Ingestion Abdominal pain. Diarrhoea. Nausea. Vomiting. Muscle paralysis. Cardiac arrhythmia. Hypertension. Death.
Do not eat, drink, or smoke during work.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. Personal protection: P2 filter respirator for harmful particles.
Airtight. Do not transport with food and feedstuffs.
EU Classification
Symbol: Xn
R: 20/22
S: (2-)-28
Note: [A]
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT5-III
Separated from food and feedstuffs. Dry. Well closed.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2004

SEE IMPORTANT INFORMATION ON BACK


BARIUM OXIDE ICSC: 0778
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
YELLOWISH-WHITE SOLID IN VARIOUS FORMS

CHEMICAL DANGERS:
The solution in water is a medium strong base. Reacts violently with water, dinitrogen tetraoxide, hydroxylamine, sulfur trioxide, and hydrogen sulfide causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as Ba) 0.5 mg/m as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2004).
MAK: (as Ba) (Inhalable fraction) 0.5 mg/m; Peak limitation category: II(2); (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes, the skin and the respiratory tract. The substance may cause effects on the nervous system. Exposure could cause hypokalaemia, resulting in cardiac disorders and muscular disorders. Exposure may result in death.

PHYSICAL PROPERTIES
Boiling point: about 2000C
Melting point: 1923C
Density: 5.7 g/cm
Solubility in water, g/100 ml at 20C: 3.8
ENVIRONMENTAL DATA
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.
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 2004