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5-Methyl-3-heptanone

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Synonyms & Trade Names
Amyl ethyl ketone, Ethyl amyl ketone, 3-Methyl-5-heptanone
CAS No.
541-85-5
RTECS No.
MJ7350000
DOT ID & Guide
2271 128
Formula
C₂H₅COCH₂CH(CH₃)CH₂CH₃
Conversion
1 ppm = 5.24 mg/m3
IDLH
100 ppm
See: 541855
Exposure Limits
NIOSH REL
TWA 25 ppm (130 mg/m3)
OSHA PEL
TWA 25 ppm (130 mg/m3)
Measurement Methods
NIOSH 1301 , 2553
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a pungent odor.
Molecular Weight
128.2
Boiling Point
315°F
Freezing Point
-70°F
Solubility
Insoluble
Vapor Pressure
2 mmHg
Ionization Potential
?
Specific Gravity
0.82
Flash Point
138°F
Upper Explosive Limit
?
Lower Explosive Limit
?
Class II Combustible Liquid: Fl.P. at or above 100°F and below 140°F.
Incompatibilities & Reactivities
Strong oxidizers
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
Personal Protection/Sanitation
(See protection codes)
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

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1391
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health