Cyclohexane CAS# 110-82-7
Effective Solvent: Cyclohexane is miscible with organic solvents like ethanol, ether, and acetone, making it a versatile solvent in various industrial processes.
Stable under Mild Conditions: It remains stable in acids, alkalis, and medium concentrations of nitric acid, making it resistant to environmental factors.
Versatile Chemical Reactions: Cyclohexane can undergo nitration, dehydrogenation, and isomerization, providing various synthetic pathways for other chemicals.
Volatile and Flammable: Cyclohexane has a low flash point and can form explosive mixtures with air, requiring careful handling in industrial settings.
Cyclohexane is a colorless liquid with a gasoline-like odor. It is insoluble in water but miscible with organic solvents like ethanol, ether, acetone, and benzene. In methanol, its solubility is 57 parts per 100 parts at 25°C. Volatile and flammable, it has a flash point of 18°C, and its vapor forms an explosive mixture with air, with an explosion limit of 1.3-8.3%.
Cyclohexane is stable in acids and alkalis and does not react with medium concentrations of nitric acid at low temperatures. However, it undergoes nitration with dilute nitric acid above 100°C to form nitrocyclohexane. Dehydrogenation above 350°C with platinum or palladium catalysts produces benzene. It can also isomerize with aluminum oxide, molybdenum sulfide, copper, or nickel-aluminum to form methylpentane, and with aluminum trichloride to form methylcyclopentane.
Parameters
Melting point | 4-7 °C (lit.) |
Boiling point | 80.7 °C (lit.) |
density | 0.779 g/mL at 25 °C (lit.) |
vapor density | 2.9 (vs air) |
vapor pressure | 168.8 mm Hg ( 37.7 °C) |
refractive index | n20/D 1.426(lit.) |
Fp | -1 °F |
storage temp. | Store at +5°C to +30°C. |
solubility | ethanol: miscible(lit.) |
form | Liquid |
color | colorless |
Relative polarity | 0.006 |
Odor | resembling benzene; mild, sweet, resembling chloroform. |
explosive limit | 1.2-8.3%(V) |
Odor Threshold | 2.5ppm |
Water Solubility | PRACTICALLY INSOLUBLE |
FreezingPoint | 6.554℃ |
λmax | λ: 210 nm Amax: ≤1.00 |
Merck | 14,2723 |
BRN | 1900225 |
Henry's Law Constant | 1.03, 1.26, 1.40, 1.77, and 2.23 at 10, 15, 20, 25, and 30 °C, respectively (EPICS, Ashworth et al., 1988) 0.54, 0.69, 0.82, 1.43, and 1.79 at 2.0, 6.0, 10.0, 18.0, and 25.0 °C, respectively (Dewulf et al.,1999) |
Dielectric constant | 2.0（20℃） |
Exposure limits | TLV-TWA 300 ppm (～1050 mg/m3) (ACGIH, OSHA, and NIOSH); IDLH 10,000 ppm (NIOSH). |
Stability: | Volatile |
InChIKey | XDTMQSROBMDMFD-UHFFFAOYSA-N |
LogP | 3.44 at 20℃ |
Surface tension | 25.06mN/m at 293.15K |
CAS DataBase Reference | 110-82-7(CAS DataBase Reference) |
NIST Chemistry Reference | Cyclohexane(110-82-7) |
EPA Substance Registry System | Cyclohexane (110-82-7) |
Safety Information
Hazard Codes | F,Xn,N |
Risk Statements | 11-38-50/53-65-67-20 |
Safety Statements | 9-16-25-33-60-61-62 |
RIDADR | UN 1145 3/PG 2 |
OEB | A |
OEL | TWA: 300 ppm (1050 mg/m3) |
WGK Germany | 2 |
RTECS | GU6300000 |
F | 3-10 |
Autoignition Temperature | 500 °F |
TSCA | Yes |
HS Code | 2902 11 00 |
HazardClass | 3 |
PackingGroup | II |
Hazardous Substances Data | 110-82-7(Hazardous Substances Data) |
Toxicity | LC in mice: ~60-70 mg/l air (Lazarew) |
IDLA | 1,300 ppm [10% LEL] |
