Barium sulphate
Blanc fixe
Artificial barite
BaSO4
Molecular mass: 233.43
ICSC # 0827
CAS # 7727-43-7
RTECS # CR0600000
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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.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Local exhaust or breathing protection.
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Fresh air, rest.
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•Skin
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Protective gloves.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
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•Eyes
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Safety spectacles.
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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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Do not eat, drink, or smoke during work.
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Rinse mouth.
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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; if appropriate, moisten first to prevent dusting.
Personal protection: P1 filter respirator for inert particles.
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Important Data
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Physical State; Appearance:
ODOURLESS
TASTELESS, WHITE OR YELLOWISH CRYSTALS
OR POWDER.
Physical Dangers:
Chemical Dangers:
Reacts violently with aluminium powder.
Occupational Exposure Limits:
TLV: 10 mg/m3 as TWA; (ACGIH 2004).
MAK: (Inhalable fraction) 4 mg/m3 (Respirable fraction) 1.5 mg/m3 (DFG 2004).
OSHA PEL: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol.
Inhalation Risk:
Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly.
Effects of Short-Term Exposure:
Effects of Long-Term or Repeated Exposure:
Lungs may be affected by repeated or prolonged exposure to dust particles
, resulting in baritosis (a form of benign pneumoconiosis).
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Physical
Properties
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Melting point (decomposes): 1600°C
Density: 4.5
g/cm3
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Solubility in water: none
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Environmental
Data
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N O T E S
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Occurs in nature as the mineral barite; also as barytes, heavy spar.
Card has been partly updated in October 2005. See section Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 0827
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BARIUM SULFATE
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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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