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26760-64-5

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Basic Information
CAS No.: 26760-64-5
Name: 2-methylbutene
Molecular Structure:
Molecular Structure of 26760-64-5 (2-methylbutene)
Formula: C5H12
Molecular Weight: 70.15
Synonyms: Isoamylene(6CI,7CI);Isopentene;Methylbutene;tert-Amylene;
EINECS: 247-975-0
Density: 0.661g/cm3
Melting Point: -137.5oC
Boiling Point: 30.4°C at 760 mmHg
Solubility: 193mg/L at 25℃
PSA: 0.00000
LogP: 1.97250
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Chemistry

Molecule structure of 2-Methylbutene (CAS NO.26760-64-5) :

IUPAC Name: 2-methylbut-1-ene 
Molecular Weight: 70.1329 g/mol
Molecular Formula: C5H10
Density: 0.661 g/cm3 
Boiling Point: 30.4 °C at 760 mmHg 
Water Solubility: 188 mg/L
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
Henry's Law Constant: 0.319 atm-m3/mole at 25 °C
Atmospheric OH Rate Constant: 5.26E-11 cm3/molecule-sec at 25 °C
XLogP3-AA: 2.5
Rotatable Bond Count: 1
Exact Mass: 70.07825
MonoIsotopic Mass: 70.07825
Heavy Atom Count: 5
Complexity: 35.3
Canonical SMILES: CCC(=C)C
InChI: InChI=1S/C5H10/c1-4-5(2)3/h2,4H2,1,3H3
InChIKey: MHNNAWXXUZQSNM-UHFFFAOYSA-N
EINECS: 247-975-0

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Moderately toxic by ingestion and inhalation. Narcotic in high concentration. A simple asphyxiant. Extremely flammable. Moderately explosive when exposed to heat, flame, or powerful oxidizers. To fight fire, use alcohol foam, spray, mist, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes.
RIDADR: 2371
HazardClass: 3.1
PackingGroup: I

Standards and Recommendations

DOT Classification:  3; Label: Flammable Liquid

Specification

 2-Methylbutene (CAS NO.26760-64-5) is flammable liquids.  It can burst by heat and fire. 2-Methylbutene (CAS NO.26760-64-5) can form an explosive mixture if mixed with air. So the storage environment should be ventilate, low-temperature and dry. Keep 2-Methylbutene (CAS NO.26760-64-5) separate from Oxidants, acids