# NIOSH Pocket Guide to Chemical Hazards
Methylcyclohexane | CAS 108-87-2
CH3C6H11 | RTECS GV6125000
Synonyms & Trade Names Cyclohexylmethane, Hexahydrotoluene | DOT ID & Guide 2296 128
Exposure Limits | NIOSH REL: TWA 400 ppm (1600 mg/m3)
OSHA PEL†: TWA 500 ppm (2000 mg/m3)
IDLH 1200 ppm [LEL] | Conversion 1 ppm = 4.02 mg/m3
Physical Description Colorless liquid with a faint, benzene-like odor.
MW: 98.2 | BP: 214°F | FRZ: -196°F | Sol: Insoluble
VP: 37 mmHg | IP: 9.85 eV |  | Sp.Gr: 0.77
Fl.P: 25°F | UEL: 6.7% | LEL: 1.2% |
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Strong oxidizers
Measurement Methods NIOSH 1500; OSHA 7
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: Soap wash promptly Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH Up to 1200 ppm: (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, nose, throat; dizziness, drowsiness; in animals: narcosis
Target Organs Eyes, skin, respiratory system, central nervous system
See also: INTRODUCTION