# NIOSH Pocket Guide to Chemical Hazards
Iron pentacarbonyl (as Fe) | CAS 13463-40-6
Fe(CO)5 | RTECS NO4900000
Synonyms & Trade Names Iron carbonyl, Pentacarbonyl iron | DOT ID & Guide 1994 131
Exposure Limits | NIOSH REL: TWA 0.1 ppm (0.23 mg/m3) ST 0.2 ppm (0.45 mg/m3)
OSHA PEL†: none
IDLH N.D. | Conversion 1 ppm = 2.28 mg/m3 (as Fe)
Physical Description Colorless to yellow to dark-red, oily liquid.
MW: 195.9 | BP(749 mmHg): 217°F | FRZ: -6°F | Sol: Insoluble
VP(87°F): 40 mmHg | IP: ? |  | Sp.Gr: 1.46-1.52
Fl.P: 5°F | UEL: ? | LEL: ? |
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Oxidizers, nitrogen oxide, (zinc + cobalt halides) [Note: Pyrophoric (i.e., ignites spontaneously in air). Decomposed by light or air, releasing carbon monoxide.]
Measurement Methods None available
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation Provide: Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap flush immediately 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, mucous membrane, respiratory system; headache, dizziness, nausea, vomiting; fever, cyanosis, cough, dyspnea (breathing difficulty); liver, kidney, lung injury; degenerative changes in central nervous system
Target Organs Eyes, respiratory system, central nervous system, liver, kidneys
See also: INTRODUCTION