NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Methyl cyclopentadienyl manganese tricarbonyl (as Mn)

CAS
12108-13-3

CH3C5H4Mn(CO)3

RTECS
OP1450000
Synonyms & Trade Names

CI-2, Combustion Improver-2, Manganese tricarbonylmethylcyclopentadienyl, 2-Methylcyclopentadienyl manganese tricarbonyl, MMT
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 0.2 mg/m3 [skin]
OSHA PEL: C 5 mg/m3
IDLH
N.D. See: IDLH INDEX
Conversion
Physical Description
Yellow to dark-orange liquid with a faint, pleasant odor. [Note: A solid below 36°F.]
MW: 218.1
BP: 449°F
FRZ: 36°F
Sol: Insoluble
VP(212°F): 7 mmHg
IP: ?

Sp.Gr: 1.39
Fl.P: 230°F
UEL: ?
LEL: ?

Class IIIB Combustible Liquid: Fl.P. at or above 200F.
Incompatibilities & Reactivities

Light (decomposes)
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: No recommendation

First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
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; dizziness, nausea, headache; in animals: tremor, severe clonic spasms, lassitude (weakness, exhaustion), slow respiration; liver, kidney injury
Target Organs
Eyes, central nervous system, liver, kidneys
See also: INTRODUCTION   See ICSC CARD: 1169