Barium monoxide
Barium protoxide
Calcined baryta
BaO
Molecular mass: 153.3
ICSC # 0778
CAS # 1304-28-5
RTECS # CQ9800000
UN # 1884
EC # 056-002-00-7
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
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In case of fire in the surroundings:
NO water
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
STRICT HYGIENE!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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Redness.
Pain.
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Protective gloves.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Safety spectacles,
or eye protection in combination with breathing protection if powder.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Diarrhoea.
Nausea.
Vomiting.
Muscle paralysis. Cardiac arrhythmia. Hypertension. Death.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Induce vomiting (ONLY IN CONSCIOUS PERSONS!).
Give plenty of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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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.
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Separated from
food and feedstuffs
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Dry.
Well closed.
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Airtight.
Do not transport with food and feedstuffs.
Note: A
Xn symbol
R: 20/22
S: 2-28
UN Hazard Class: 6.1
UN Packing Group: III
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Important Data
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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
causing fire and explosion hazard.
Occupational Exposure Limits:
TLV: (as Ba) 0.5 mg/m3 as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2004).
MAK: (as Ba) (Inhalable fraction) 0.5 mg/m3
Peak limitation category: II(2);
(DFG 2004).
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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.
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.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: about 2000°C
Melting point: 1923°C
Density: 5.7
g/cm3
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Solubility in water, g/100 ml at 20°C: 3.8
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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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.
Transport Emergency Card: TEC (R)-61GT5-III
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ADDITIONAL INFORMATION
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ICSC: 0778
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BARIUM OXIDE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
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.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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