NIOSH Pocket Guide to Chemical Hazards

Barium sulfate CAS 7727-43-7
BaSO4 RTECS CR0600000
Synonyms & Trade Names
Artificial barite, Barite, Barium salt of sulfuric acid, Barytes (natural)
DOT ID & Guide
1564 154 (barium compounds, n.o.s.)
Exposure
Limits
NIOSH REL: TWA 10 mg/m3 (total) TWA 5 mg/m3 (resp)
OSHA PEL�: TWA 15 mg/m3 (total) TWA 5 mg/m3 (resp)
IDLH N.D. Conversion
Physical Description
White or yellowish, odorless powder.
MW: 233.4
BP: 2912°F (Decomposes)
MLT: 2876°F
Sol(64°F): 0.0002%
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: 4.25-4.5
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Solid
Incompatibilities & Reactivities
Phosphorus, aluminum [Note: Aluminum in the presence of heat can cause an explosion.]
Measurement Methods
NIOSH 0500, 0600
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: Daily
Remove: No recommendation
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations To be added later
Exposure Routes inhalation, skin and/or eye contact
Symptoms Irritation eyes, nose, upper respiratory system; benign pneumoconiosis (baritosis)
Target Organs Eyes, respiratory system
See also: INTRODUCTION