ChemicalBook > CAS DataBase List > 3-Methyl-1-butene

3-Methyl-1-butene

Product Name: 3-Methyl-1-butene
CAS No.: 563-45-1
Chemical Name: 3-Methyl-1-butene
Synonyms: ISOAMYLENE;ISOPENTENE;1-Butene, 3-methyl-;3-Methylbutene;α-Isopentene;Vinylisopropyl;(CH3)2CHCH=CH2;Methylbutenemin;Methylbutene,95%;alpha-Isoamylene
CBNumber: CB5751808
Molecular Formula: C5H10
Formula Weight: 70.13
MOL File: 563-45-1.mol

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3-Methyl-1-butene Property

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
Flash point:: -57 °C
storage temp.: −20°C
solubility: Soluble in alcohol, benzene, and ether (Weast, 1986)
pka: >14 (Schwarzenbach et al., 1993)
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 Reference: 563-45-1(CAS DataBase Reference)
NIST Chemistry Reference: 1-Butene, 3-methyl-(563-45-1)
EPA Substance Registry System: 3-Methyl-1-butene (563-45-1)

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Safety

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 Data: 563-45-1(Hazardous Substances Data)

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H224Extremely flammable liquid and vapour

H304May be fatal if swallowed and enters airways

H335May cause respiratory irritation

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P233Keep container tightly closed.

P273Avoid release to the environment.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P331Do NOT induce vomiting.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 257931
Product name: 3-Methyl-1-butene
Purity: 95%
Packaging: 100g
Price: $250
Updated: 2025/07/31

Sigma-Aldrich

Product number: 257931
Product name: 3-Methyl-1-butene
Purity: 95%
Packaging: 400g
Price: $613
Updated: 2025/07/31

TCI Chemical

Product number: M0177
Product name: 3-Methyl-1-butene (in cylinder without valve) [To use this product charged in cylinder, a valve is required which is sold separately (Product Code:V0030)]
Purity: >95.0%(GC)
Packaging: 100g
Price: $232
Updated: 2025/07/31

TCI Chemical

Product number: M2563
Product name: 3-Methyl-1-butene (ca. 15% in Dichloromethane, ca. 2.5mol/L)
Packaging: 100mL
Price: $95
Updated: 2024/03/01

TCI Chemical

Product number: M2565
Product name: 3-Methyl-1-butene (ca. 12.5% in Tetrahydrofuran, ca. 1.5mol/L)
Packaging: 100mL
Price: $69
Updated: 2025/07/31

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3-Methyl-1-butene Chemical Properties,Usage,Production

Chemical Properties

Colorless, extremely volatile liquid or gas; disagreeable odor.Soluble in alcohol; insoluble in water.

Physical properties

Colorless, flammable liquid or gas with a disagreeable odor

Uses

3-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.

Uses

Organic synthesis, high-octane fuel manufacture.

Definition

ChEBI: An alkene that is but-1-ene carrying a methyl substituent at position 3.

General Description

A 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 Reactions

Highly flammable. Insoluble in water.

Reactivity Profile

3-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.

Hazard

Highly flammable, dangerous fire and explosion risk, explosive limits 1.6–9.1%.

Health Hazard

Inhalation 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 Profile

Very 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.

Source

Schauer 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 Fate

Photolytic. 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

Raw materials

Preparation Products

ethyl 3,3-dimethylpent-4-en-1-oate 4-Methylvaleric acid methyl(±)cis，trans-2，2-dimethyl-3-(2-methyl-1-propenyl cyclopropane carboxylate) Pinacolone 3-Methyl-2-buten-1-ol 2-Methyl-2-butene Triadimefon 2-Methyl-2-butanol 1-Chloro-3-methyl-2-butene Isoprene 2,2-DIMETHYL-3-(2-METHYLPROP-1-ENYL)CYCLOPROPANECARBOXYLIC ACID

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View Lastest Price from 3-Methyl-1-butene manufacturers

Hebei Chuanghai Biotechnology Co,.LTD

Product: 3-Methyl-1-butene 563-45-1
Price: US $10.00/KG
Min. Order: 1KG
Purity: 95%
Supply Ability: 10 ton
Release date: 2024-08-20

Henan Fengda Chemical Co., Ltd

Product: 3-Methyl-1-butene 563-45-1
Price: US $100.00-1.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: g-kg-tons, free sample is available
Release date: 2023-12-26

Career Henan Chemical Co

Product: 3-Methyl-1-butene 563-45-1
Price: US $7.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 100Kg
Release date: 2020-01-03

563-45-1, 3-Methyl-1-buteneRelated Search:

Methyl acrylate Polybutene Methylparaben 3-METHYL-3-BUTEN-1-OL N-Methyl-2-pyrrolidone Bensulfuron methyl N,N-Diisopropylethylamine 3-Methyl-1-butanol ISOPROPYLTRICHLOROSILANE 3-Methyl-2-butanone CIS-BUTENEDIOIC ANHYDRIDE Tiglic aldehyde Diisopropylamine Kresoxim-methyl 2-Bromopropane Thiophanate-methyl 1-BUTENE Methyl acetate

alpha-Isoamylene

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3-METHYL-1-BUTENE

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3-METHYL-1-BUTENE, 97%3-METHYL-1-BUTENE, 97%3-METHYL-1-BUTENE, 97%3-METHYL-1-BUTENE, 97%

3-Methyl-1-butene (in cylinder without valve) [To use this product charged in cylinder, a valve is required which is sold separately (Product Code:V0030)]

Isoamylene Isopentene Isopropylethylene

3-Methyl-1-butene&nbsp

3-Methyl-1-butene (ca. 12.5% in Tetrahydrofuran, ca. 1.5mol/L)

3-Methyl-1-butene (ca. 15% in Dichloromethane, ca. 2.5mol/L)

3-Methyl-1-butene (ca. 16.5% in N,N-Dimethylformamide, ca. 2mol/L)

(CH3)2CHCH=CH2

2-Methyl-3-butene

3-methyl-1-buten

3-METHYL-1-BUTENE (IN CYLINDER WITHOUT VALVE) 95+%

3-Methyl-1-butene (in cylinder without valve)

1-Butene, 3-methyl-

3-Methyl-1-butene(incylinderwithoutvalve)[Tousethisproductchargedincylinder,avalveisrequiredwhichissoldseparately(ProductCode:V0030)]&gt

3-Methyl-1-butene(ca.16.5%inN,N-Dimethylformamide,ca.2mol/L)&gt

3-Methyl-1-butenethis

3-Methyl-1-butene ISO 9001：2015 REACH

3-Methyl-1-butene (12.5%inTHF)

3-Methyl-1-butene in Methanol

α-Isopentene

563-45-1

C3H7CHCH2

563451

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