NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

2-Pentanone

CAS
107-87-9

CH3COCH2CH2CH3

RTECS
SA7875000
Synonyms & Trade Names

Ethyl acetone, Methyl propyl ketone, MPK
DOT ID & Guide
1249 / 127

Exposure
Limits

NIOSH REL: TWA 150 ppm (530 mg/m3)
OSHA PEL: TWA 200 ppm (700 mg/m3)
IDLH
1500 ppm See: 107879
Conversion
1 ppm = 3.52 mg/m3
Physical Description
Colorless to water-white liquid with a characteristic acetone-like odor.
MW: 86.1
BP: 215°F
FRZ: -108°F
Sol: 6%
VP: 27 mmHg
IP: 9.39 eV

Sp.Gr: 0.81
Fl.P: 45°F
UEL: 8.2%
LEL: 1.5%

Class IB Flammable Liquid: Fl.P. below 73F and BP at or above 100F.
Incompatibilities & Reactivities

Oxidizers, bromine trifluoride
Measurement Methods
NIOSH 1300, 2555
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 (flammable)
Change: No recommendation

First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Water flush
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations
NIOSH
Up to 1500 ppm:
(APF = 10) Any chemical cartridge respirator with organic vapor cartridge(s)*
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)*
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
(APF = 10) Any supplied-air respirator*
(APF = 50) Any self-contained breathing apparatus with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
Irritation eyes, skin, mucous membrane; headache; dermatitis; narcosis, coma
Target Organs
Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0816   See MEDICAL TESTS: 0146