CDC - NIOSH Pocket Guide to Chemical Hazards -

Calcium carbonate (original) (raw)

Synonyms & Trade Names

Calcium salt of carbonic acid [Note: Occurs in nature as as limestone, chalk, marble, dolomite, aragonite, calcite and oyster shells.]

CAS No.

471-34-1 (synthetic)
1317-65-3 (natural)

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)

Physical Description

White, odorless powder or colorless crystals.

Incompatibilities & Reactivities

Acids, alum, ammonium salts, mercury & hydrogen, fluorine, magnesium

Exposure Routes

inhalation, skin and/or eye contact

Symptoms

irritation eyes, skin, respiratory system; cough

Target Organs

Eyes, skin, respiratory system

Personal Protection/Sanitation

(See protection codes)
**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

Respirator Recommendations