NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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 compound, 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. See: IDLH INDEX
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
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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
Not available.
Important additional information about respirator selection
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   See ICSC CARD: 0827   See MEDICAL TESTS: 0021