ChemicalBook Product Catalog Organic Chemistry Hydrocarbons and derivatives Acyclic hydrocarbons 3-Methyl-1-butene

3-Methyl-1-butene

3-Methyl-1-butene Basic information
Product Name:3-Methyl-1-butene
Synonyms:alpha-Isoamylene;Vinylisopropyl;3-METHYL-1-BUTENE;3-METHYLBUTENE-1;ALPHA-ISOPENTENE;ISOPROPYLETHYLENE;ISOPENTENE;ISOAMYLENE
CAS:563-45-1
MF:C5H10
MW:70.13
EINECS:209-249-1
Product Categories:Gas Cylinders;Hydrocarbons (Low Boiling point);Synthetic Organic Chemistry;Alpha Sort;Hydrocarbons;M;MAlphabetic;META - METHChemical Class;NeatsGasoline, Diesel,&Petroleum;Olefins;Substance classes;Volatiles/ Semivolatiles;Chemical Synthesis;Compressed and Liquefied Gases;Synthetic Reagents;Acyclic;Alkenes;Organic Building Blocks
Mol File:563-45-1.mol
3-Methyl-1-butene Structure
3-Methyl-1-butene Chemical Properties
Melting point -168 °C
Boiling point 20 °C(lit.)
density 0.627 g/mL at 20 °C(lit.)
vapor pressure 14.97 psi ( 20 °C)
refractive index n20/D 1.364
Fp -57 °C
storage temp. −20°C
solubility Soluble in alcohol, benzene, and ether (Weast, 1986)
pka>14 (Schwarzenbach et al., 1993)
form neat
color Colorless to Almost colorless
Water Solubility 130 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966)
BRN 505980
Henry's Law Constant(atm?m3/mol): 0.535 at 25 °C (Hine and Mookerjee, 1975)
CAS DataBase Reference563-45-1(CAS DataBase Reference)
NIST Chemistry Reference1-Butene, 3-methyl-(563-45-1)
EPA Substance Registry System3-Methyl-1-butene (563-45-1)
Safety Information
Hazard Codes F+,Xn
Risk Statements 12-36/37/38-65
Safety Statements 16-26-62
RIDADR UN 2561 3/PG 1
WGK Germany 3
F 4.5-31
HazardClass 3.1
PackingGroup I
HS Code 2901290000
Hazardous Substances Data563-45-1(Hazardous Substances Data)
MSDS Information
ProviderLanguage
SigmaAldrich English
3-Methyl-1-butene Usage And Synthesis
Chemical PropertiesColorless, extremely volatile liquid or gas; disagreeable odor.Soluble in alcohol; insoluble in water.
Physical propertiesColorless, flammable liquid or gas with a disagreeable odor
Uses3-Methyl-1-butene has been used in asymmetric total synthesis of (?)-Linderol A, a potent inhibitor of melanin biosynthesis of cultured B-16 melanoma cells.
UsesOrganic synthesis, high-octane fuel manufacture.
DefinitionChEBI: An alkene that is but-1-ene carrying a methyl substituent at position 3.
General DescriptionA colorless volatile liquid with a disagreeable odor. Insoluble in water and less dense than water. Vapors heavier than air. Flash point below 0°F. Used to make other chemicals.
Air & Water ReactionsHighly flammable. Insoluble in water.
Reactivity Profile3-Methyl-1-butene may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions.
HazardHighly flammable, dangerous fire and explosion risk, explosive limits 1.6–9.1%.
Health HazardInhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.
Safety ProfileVery dangerous fire hazard when exposed to heat, flame, or oxidizers. Explosive in the form of vapor when exposed to heat or flame. To fight fire, use alcohol foam, mist, spray, dry chemical, CO2. When heated to decomposition it emits acrid smoke and irritating fumes. See also 2-METHYL-1 BUTENE.
SourceSchauer et al. (1999) reported 3-methyl-1-butene in a diesel-powered medium-duty truck exhaust at an emission rate of 160 μg/km.
Schauer et al. (2001) measured organic compound emission rates for volatile organic compounds, gas-phase semi-volatile organic compounds, and particle-phase organic compounds from the residential (fireplace) combustion of pine, oak, and eucalyptus. The gas-phase emission rate of 3-methyl-1-butene was 6.9 mg/kg of pine burned. Emission rates of 3-methyl-1-butene were not measured during the combustion of oak and eucalyptus.
California Phase II reformulated gasoline contained 3-methyl-1-butene at a concentration of 380 mg/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 0.35 and 22.5 mg/km, respectively (Schauer et al., 2002).
Environmental fatePhotolytic. The following rate constants were reported for the reaction of 3-methyl-1-butene and OH radicals in the atmosphere: 3.0 x 10-11 cm3/molecule?sec (Atkinson et al., 1979); 6.07 to 9.01 x 10-11 cm3/molecule?sec (Atkinson, 1985); 3.18 x 10-11 cm3/molecule?sec (Atkinson, 1990).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water.
3-Methyl-1-butene Preparation Products And Raw materials
Preparation ProductsTriadimefon-->Pinacolone-->2-Methyl-2-butanol-->methyl(±)cis，trans-2，2-dimethyl-3-(2-methyl-1-propenyl cyclopropane carboxylate)-->Isoprene-->2,2-DIMETHYL-3-(2-METHYLPROP-1-ENYL)CYCLOPROPANECARBOXYLIC ACID-->3-Methyl-2-buten-1-ol-->1-Chloro-3-methyl-2-butene-->2-Methyl-2-butene-->ethyl 3,3-dimethylpent-4-en-1-oate-->4-Methylvaleric acid-->Isopentyl ether-->tert-Amylbenzene
Methylparaben 1-BUTENE Polybutene TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATO)EUROPIUM(III) 3-METHYL-3-BUTEN-1-OL 3-Methyl-2-butanone N-Methyl-2-pyrrolidone Bensulfuron methyl Tiglic aldehyde Maleic anhydride N,N-Diisopropylethylamine 3-Methyl-1-butene ISOPROPYLTRICHLOROSILANE Thiophanate-methyl Methyl acrylate 3-Methyl-1-butanol Methyl bromide TRIS(2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATO)DYSPROSIUM(III)
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