# NIOSH Pocket Guide to Chemical Hazards
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 | 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 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Oxidizers, bromine trifluoride
Measurement Methods NIOSH 1300
Personal Protection & Sanitation 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
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