IUPAC Name: 2-Methylbut-1-ene 
Molecular Formula: C₅H₁₀
Molecular Weight: 70.14g/mol
Density: 0.661 g/cm³
Melting Point: 137 °C(lit.)
Boiling Point:  30.4 °C at 760 mmHg 
Flash Point: -48 °C (closed cup)
Appearance: colourless liquid
Hazard Symbols: highly flammable, dangerous fire and explosion risk.
Storage Temperature:  2-8°C
Freely Rotating Bonds: 1 
Polar Surface Area: 0Ų 
Index of Refraction: 1.384 
Molar Refractivity: 24.78 cm³ 
Molar Volume: 105.9 cm³ 
Polarizability: 9.82 ×10^-24 cm³ 
Surface Tension: 17.3 dyne/cm 
Enthalpy of Vaporization: 25.5 kJ/mol 
Vapour Pressure: 627 mmHg at 25°C  
 2-Methbul-1-butene ,its Cas Register Number is 563-46-2.The chemical synonyms of 2-Methbul-1-butene (CAS No.563-46-2) are 1-Butene,2-methyl- ; 1-Isoamylene ; 2-Methyl-1-buten ; 2-Methyl-but-1-ene ; 2-Methylbutene-1(99%min.) ; C₂H₅C(CH₃)=CH₂ ; Gamma-Isoamylene ; 2-Methylbutene .Product categories of 2-Methbul-1-butene (CAS No.563-46-2) are Acyclic ; Alkenes ; Organic building blocks ; Alpha sort ; Hydrocarbons ; M ; MAlphabetic  ; NeatsGasoline, Diesel,&Petroleum ; Olefins ; Substance clas .The molecular structure of 2-Methbul-1-butene (CAS No.563-46-2) is.

Reported in EPA TSCA Inventory.

A simple asphyxiant. Very dangerous fire hazard when exposed to heat, flame, or oxidizers. To fight fire, use dry chemical, CO₂, foam. When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Codes: F+ ,Xn,Xi
F+:  Extremely Flammable
Xn:  Harmful
Xi:  Irritant
Risk Statements:  12-65
65:  Harmful: May cause lung damage if swallowed 
12:  Extremely Flammable 
Safety Statements:  16-62-33-29-7/9
16:  Keep away from sources of ignition - No smoking 
29:  Do not empty into drains 
33:  Take precautionary measures against static discharges 
62:  If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label
7/9:  Keep container tightly closed and in a well-ventilated place

If 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.