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2-Hexanone

Synonyms & Trade Names
Butyl methyl ketone, MBK, Methyl butyl ketone, Methyl n-butyl ketone
CAS No.
591-78-6
RTECS No.
MP1400000
DOT ID & Guide
Formula
CH₃CO[CH₂]₃CH₃
Conversion
1 ppm = 4.10 mg/m3
IDLH
1600 ppm
See: 591786
Exposure Limits
NIOSH REL
TWA 1 ppm (4 mg/m3)
OSHA PEL
TWA 100 ppm (410 mg/m3) See Appendix G
Measurement Methods
NIOSH 1300 , 2555;
OSHA PV2031
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with an acetone-like odor.
Molecular Weight
100.2
Boiling Point
262°F
Freezing Point
-71°F
Solubility
2%
Vapor Pressure
11 mmHg
Ionization Potential
9.34 eV
Specific Gravity
0.81
Flash Point
77°F
Upper Exposive Limit
8%
Lower Explosive Limit
?
Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
Incompatibilities & Reactivities
Strong oxidizers
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, nose; peripheral neuropathy: lassitude (weakness, exhaustion), paresthesia; dermatitis; headache, drowsiness
Target Organs
Eyes, skin, respiratory system, central nervous system, peripheral nervous system
Personal Protection/Sanitation
(See protection codes)
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:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

Up to 10 ppm:
(APF = 10) Any supplied-air respirator

Up to 25 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode

Up to 50 ppm:
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 1600 ppm:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode

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: 0489   MEDICAL TESTS: 0132

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