NIOSH Pocket Guide to Chemical Hazards

Calcium carbonate

CAS 1317-65-3


RTECS EV9580000
Synonyms & Trade Names
Calcium salt of carbonic acid [Note: Occurs in nature as as limestone, chalk, marble, dolomite, aragonite, calcite & oyster shells.]
DOT ID & Guide


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, odorless powder or colorless crystals.
MW: 100.1
BP: Decomposes
MLT: 1517-2442°F (Decomposes)
Sol: 0.001%
VP: 0 mmHg (approx)

Sp.Gr: 2.7-2.95
Fl.P: NA

Noncombustible Solid
Incompatibilities & Reactivities
Acids, alum, ammonium salts, mercury & hydrogen, fluorine, magnesium
Measurement Methods
NIOSH 7020, 7303; OSHA ID121
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash
Breathing: Fresh air

Important additional information about respirator selection
Respirator Recommendations Not available.
Exposure Routes inhalation, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; cough
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION   See ICSC CARD: 1193