NIOSH Pocket Guide to Chemical Hazards

5-Methyl-3-heptanone CAS 541-85-5
C2H5COCH2CH(CH3)CH2CH3 RTECS MJ7350000
Synonyms & Trade Names
Amyl ethyl ketone, Ethyl amyl ketone, 3-Methyl-5-heptanone
DOT ID & Guide
2271 127
Exposure
Limits
NIOSH REL: TWA 25 ppm (130 mg/m3)
OSHA PEL: TWA 25 ppm (130 mg/m3)
IDLH 100 ppm Conversion 1 ppm = 5.24 mg/m3
Physical Description
Colorless liquid with a pungent odor.
MW: 128.2
BP: 315°F
FRZ: -70°F
Sol: Insoluble
VP: 2 mmHg
IP: ?

Sp.Gr: 0.82
Fl.P: 138°F
UEL: ?
LEL: ?

Class II Combustible Liquid: Fl.P. at or above 100F and below 140F.
Incompatibilities & Reactivities
Strong oxidizers
Measurement Methods
NIOSH 1301
Personal Protection & Sanitation
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: Water flush
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 100 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; narcosis, coma; dermatitis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION