NIOSH logo and tagline

o-Methylcyclohexanone

Related Pages
Synonyms & Trade Names
2-Methylcyclohexanone
CAS No.
583-60-8
RTECS No.
GW1750000
DOT ID & Guide
2297 128
Formula
CH₃C₆H₉O
Conversion
1 ppm = 4.59 mg/m3
IDLH
600 ppm
See: 583608
Exposure Limits
NIOSH REL
TWA 50 ppm (230 mg/m3) ST 75 ppm (345 mg/m3) [skin]
OSHA PEL
TWA 100 ppm (460 mg/m3) [skin] See Appendix G
Measurement Methods
NIOSH 2521
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a weak, peppermint-like odor.
Molecular Weight
112.2
Boiling Point
325°F
Freezing Point
7°F
Solubility
Insoluble
Vapor Pressure
1 mmHg
Ionization Potential
?
Specific Gravity
0.93
Flash Point
118°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, skin absorption, ingestion, skin and/or eye contact
Symptoms
In Animals: irritation eyes, mucous membrane; narcosis; dermatitis
Target Organs
Skin, respiratory system, liver, kidneys, 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:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH

Up to 500 ppm:
(APF = 10) Any supplied-air respirator*

Up to 600 ppm:
(APF = 25) Any supplied-air respirator 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

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
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health