ChemicalBook > Product Catalog > Organic Chemistry > Hydrocarbons and derivatives > Cyclic hydrocarbons > Methylcyclopentane
Methylcyclopentane Chemical Properties
- Melting point:-142.4 °C
- Boiling point:72 °C(lit.)
- Density 0.749 g/mL at 25 °C(lit.)
- vapor pressure 232.8 mm Hg ( 37.7 °C)
- refractive index n
- Flash point:−11 °F
- storage temp. 0-6°C
- solubility In methanol, g/L: 380 at 5 °C, 415 at 10 °C, 500 at 15 °C, 595 at 20 °C, 740 at 25 °C, 1,100 at 30 °C. Miscible at higher temperatures (Kiser et al., 1961).
- form Adhering Crystals
- color White
- OdorLike gasoline.
- Odor Threshold1.7ppm
- explosive limit8.35%
- Water Solubility 41.8mg/L(25 ºC)
- BRN 1900214
- Henry's Law Constant0.362 atm?m3/mol at 25 °C (Hine and Mookerjee, 1975)
- CAS DataBase Reference96-37-7(CAS DataBase Reference)
- EPA Substance Registry SystemMethylcyclopentane (96-37-7)
Methylcyclopentane Usage And Synthesis
- Chemical PropertiesMethylcyclopentane is a colorless, flammable liquid with a sweet gasoline-like odor.
- Physical propertiesColorless liquid with a sweetish odor. An odor threshold concentration of 1.7 ppmv was reported by Nagata and Takeuchi (1990).
- UsesOrganic synthesis, extractive solvent,azeotropic distillation agent.
- General DescriptionA colorless liquid. Insoluble in water and less dense than water. Flash point near 20°F. Very dangerous fire risk. Vapors may be narcotic and irritating. Used to make other chemicals.
- Air & Water ReactionsHighly flammable. Insoluble in water.
- Reactivity ProfileMethylcyclopentane can react vigorously with oxidizers. .
- HazardFlammable, dangerous fire and explosionrisk. May be irritant and narcotic.
- Health HazardInhalation causes dizziness, nausea, and vomiting; concentrated vapor may cause unconsciousness and collapse. Liquid causes irritation of eyes and mild irritation of skin if allowed to remain. Ingestion causes irritation of stomach. Aspiration causes severe lung irritation, rapidly developing pulmonary edema, and central nervous system excitement followed by depression.
- Fire HazardBehavior in Fire: Vapor is heavier than air and may travel a considerable distance to a source of ignition and flash back.
- Chemical ReactivityReactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
- Safety ProfileMildly toxic by inhalation. Probably irritating and narcotic in high concentration. Very dangerous fire hazard when exposed to heat, flame, or oxidizers. Can react vigorously with oxidizing materials. To fight fire, use foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes.
- Chemical SynthesisMethylcyclopentane, occurs in various petroleums.It is readily formed by the isomerization of cyclohexane with aluminum chloride.Hydrogen and Ni at 460℃ also convert cyclohexane to methylcyclopentane. It is more readily oxidized than cyclopentane, presumably because of the tertiary H. Heating with dil. nitric acid replaces this H by a nitro group.
- Potential ExposureThis material is used as a solvent; as a fuel; and in chemical synthesis.
- SourceA constituent in gasoline. Harley et al. (2000) analyzed the headspace vapors of three
grades of unleaded gasoline where ethanol was added to replace methyl tert-butyl ether. The
gasoline vapor concentrations of methylcyclopentane in the headspace were 2.7 wt % for regular
grade, 2.6 wt % for mid-grade, and 2.6 wt % for premium grade.
California Phase II reformulated gasoline contained methylcyclopentane at a concentration of 26.2 g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 4.32 and 604 mg/km, respectively (Schauer et al., 2002).
- Environmental FatePhotolytic. A photooxidation rate constant of 7.0 x 10-12 cm3/molecule?sec was reported for the
reaction of methylcyclopentane and OH radicals in the atmosphere (Atkinson, 1990).
Chemical/Physical. Complete combustion in air produces carbon dioxide and water vapor. Methylcyclopentane will not hydrolyze because it does not contain a hydrolyzable functional group.
At elevated temperatures, rupture of the ring occurs and 1-propene is produced in a 40% yield. Other products include hydrogen and cyclic mono- and diolefins (Rice and Murphy, 1942).
- Solubility in waterIn methanol, g/L: 380 at 5 °C, 415 at 10 °C, 500 at 15 °C, 595 at 20 °C, 740 at 25 °C, 1,100 at 30 °C. Miscible at higher temperatures (Kiser et al., 1961).
- ShippingUN2298 Methyl cyclo pentane, Hazard Class: 3; Labels: 3-Flammable liquid
- Purification MethodsPurification procedures include passage through columns of silica gel (prepared by heating in nitrogen to 350o prior to use) and activated basic alumina, distillation from sodium-potassium alloy, and azeotropic distillation with MeOH, followed by washing out the methanol with water, drying and distilling. It can be stored with CaH2 or sodium. [Vogel J Chem Soc 1331 1938, Beilstein 5 III 55, 5 IV 84.]
- IncompatibilitiesIncompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides.
- Waste DisposalDissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.
Methylcyclopentane Preparation Products And Raw materials
- Raw materials
- 1-Phenyl-1-cyclopentanecarbonitrile 1,2,3,4-CYCLOPENTANETETRACARBOXYLIC ACID 1-ETHYNYLCYCLOPENTANOL CYCLOPENTYL PHENYL KETONE Cyclopentane-1,1-diacetic acid 5-AMINO-2,2,4-TRIMETHYL-1-CYCLOPENTANEMETHYLAMINE, MIXTURE OF ISOMERS,99% Cycloleucine VINYLCYCLOPENTANE 3-Cyclopentylpropionic acid ALPHA-(-)-THUJONE ALLYLCYCLOPENTANE Cyclopentanecarboxylic acid 1-(4-CHLOROPHENYL)-1-CYCLOPENTANECARBOXYLIC ACID ETHYLCYCLOPENTANE 2-METHYLCYCLOPENTANE-1,3-DIONE CYCLOPENTYLACETIC ACID Cyclopentanemethanol 1-(4-METHOXYPHENYL)-1-CYCLOPENTANECARBOXYLIC ACID
- Company Name:J & K SCIENTIFIC LTD.
- Tel:400-666-7788 010-82848833-
- Company Name:Meryer (Shanghai) Chemical Technology Co., Ltd.
- Tel:400-660-8290 21-61259100-
- Company Name:Alfa Aesar
- Company Name:TCI (Shanghai) Development Co., Ltd.
- Tel:021-67121386 / 800-988-0390
- Company Name:Energy Chemical
- Tel:400-005-6266 021-58432009