NIOSH Pocket Guide to Chemical Hazards

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
NIOSH REL: TWA 0.1 mg/m3
OSHA PEL†: none
IDLH N.D. 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

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
Personal Protection & Sanitation
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 To be added later
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