NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Cobalt carbonyl (as Co)

CAS
10210-68-1

C8Co2O8

RTECS
GG0300000
Synonyms & Trade Names

di-mu-Carbonylhexacarbonyldicobalt, Cobalt octacarbonyl, Cobalt tetracarbonyl dimer, Dicobalt carbonyl, Dicobalt Octacarbonyl, Octacarbonyldicobalt
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 0.1 mg/m3
OSHA PEL: none
IDLH
N.D. See: IDLH INDEX
Conversion
Physical Description
Orange to dark-brown, crystalline solid. [Note: The pure substance is white.]
MW: 341.9
BP: 126°F (Decomposes)
MLT: 124°F
Sol: Insoluble
VP: 0.7 mmHg
IP: ?

Sp.Gr: 1.87
Fl.P: NA
UEL: NA
LEL: NA

Noncombustible Solid, but flammable carbon monoxide is emitted during decomposition.
Incompatibilities & Reactivities

Air [Note: Decomposes on exposure to air or heat; stable in atmosphere of hydrogen & carbon monoxide.]
Measurement Methods
None available
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily

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 absorption, ingestion, skin and/or eye contact
Symptoms
Irritation eyes, skin, mucous membrane; cough, decreased pulmonary function, wheezing, dyspnea (breathing difficulty); in animals: liver, kidney injury, pulmonary edema
Target Organs
Eyes, skin, respiratory system, blood, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0976