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Cyclohexane

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Synonyms & Trade Names
Benzene hexahydride, Hexahydrobenzene, Hexamethylene, Hexanaphthene
CAS No.
110-82-7
RTECS No.
GU6300000
DOT ID & Guide
1145 128
Formula
C₆H₁₂
Conversion
1 ppm = 3.44 mg/m3
IDLH
1300 ppm [10%LEL]
See: 110827
Exposure Limits
NIOSH REL
TWA 300 ppm (1050 mg/m3)
OSHA PEL
TWA 300 ppm (1050 mg/m3)
Measurement Methods
NIOSH 1500;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a sweet, chloroform-like odor. [Note: A solid below 44°F.]
Molecular Weight
84.2
Boiling Point
177°F
Freezing Point
44°F
Solubility
Insoluble
Vapor Pressure
78 mmHg
Ionization Potential
9.88 eV
Specific Gravity
0.78
Flash Point
0°F
Upper Explosive Limit
8%
Lower Explosive Limit
1.3%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Oxidizers
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; drowsiness; dermatitis; narcosis, coma
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 (flammable)
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water flush promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 1300 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)£
(APF = 50) Any chemical cartridge respirator with a full facepiece and 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 = 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   ICSC CARD: 0242   MEDICAL TESTS: 0062
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health