# NIOSH Pocket Guide to Chemical Hazards
Cobalt hydrocarbonyl (as Co) | CAS 16842-03-8
HCo(CO)4 | RTECS GG0900000
Synonyms & Trade Names Hydrocobalt tetracarbonyl, Tetracarbonylhydridocobalt, Tetracarbonylhydrocobalt | DOT ID & Guide
Exposure Limits | NIOSH REL: TWA 0.1 mg/m3
OSHA PEL†: none
IDLH N.D. | Conversion
Physical Description Gas with an offensive odor.
MW: 172.0 | BP: ? | FRZ: -15°F | Sol: 0.05%
VP: >1 atm | IP: ? | RGasD: 5.93 |
Fl.P: NA (Gas) | UEL: ? | LEL: ? |
Flammable Gas
Incompatibilities & Reactivities Air [Note: Unstable gas that decomposes rapidly in air at room temperature to cobalt carbonyl & hydrogen.]
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
Respirator Recommendations To be added later
Exposure Routes inhalation, skin and/or eye contact
Symptoms In animals: irritation respiratory system; dyspnea (breathing difficulty), cough, decreased pulmonary function, pulmonary edema
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION