Methylcyclohexane

Methylcyclohexane
Names
Preferred IUPAC name
Methylcyclohexane
Other names
Hexahydrotoluene
Cyclohexylmethane
Toluene hexahydride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.003.296 Edit this at Wikidata
UNII
  • InChI=1S/C7H14/c1-7-5-3-2-4-6-7/h7H,2-6H2,1H3 checkY
    Key: UAEPNZWRGJTJPN-UHFFFAOYSA-N checkY
  • InChI=1/C7H14/c1-7-5-3-2-4-6-7/h7H,2-6H2,1H3
    Key: UAEPNZWRGJTJPN-UHFFFAOYAG
  • CC1CCCCC1
Properties
C7H14
Molar mass 98.189 g·mol−1
Appearance Colourless liquid
Odor faint, benzene-like[1]
Density 0.77 g/cm3
Melting point −126.3 °C (−195.3 °F; 146.8 K)
Boiling point 101 °C (214 °F; 374 K)
0.014 g/L at 25 °C[2]
Vapor pressure 37 mmHg (20°C)[1]

49.3 hPa at 20.0 °C
110.9 hPa at 37.7 °C[2]

-78.91·10−6 cm3/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 severe fire hazard
GHS labelling:
GHS02: FlammableGHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
Danger
H225, H302, H304, H315, H336, H410[2]
P210, P235, P301+P310, P331, P370+P378, P403[2]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
3
0
Flash point −4 °C (25 °F; 269 K)[2] Closed cup
283 °C (541 °F; 556 K)[2]
Explosive limits 1.2%-6.7%[1][2]
Lethal dose or concentration (LD, LC):
2250 mg/kg (mouse, oral)[3]
10172 ppm (mouse, 2 hr)
10,000-12,500 ppm (mouse, 2 hr)
15227 ppm (rabbit, 1 hr)[3]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 500 ppm (2000 mg/m3)[1]
REL (Recommended)
 TWA 400 ppm (1600 mg/m3)[1]
IDLH (Immediate danger)
 1200 ppm[1]
Safety data sheet (SDS) [2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Methylcyclohexane (cyclohexylmethane) is an organic compound with the molecular formula is CH3C6H11. Classified as saturated hydrocarbon, it is a colourless liquid with a faint odor.

Methylcyclohexane is used as a solvent. It is mainly converted in naphtha reformers to toluene.[4] A special use is in PF-1 priming fluid in cruise missiles to aid engine start-up when they run on special nonvolatile jet fuel like JP-10.[5] Methylcyclohexane is also used in some correction fluids (such as White-Out) as a solvent.

  1. ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0406". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b c d e f g h Sigma-Aldrich Co., Methylcyclohexane. Retrieved on 2022-03-17.
  3. ^ a b "Methylcyclohexane". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ M. Larry Campbell. "Cyclohexane" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2012. doi:10.1002/14356007.a08_209.pub2
  5. ^ Martel, Charles R. (1987). Military Jet Fuels, 1944-1987. Aero Propulsion Laboratory, Air Force Wright Aeronautical Laboratories, Air Force Systems Command, United States Air Force. p. 10.