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Names | |||
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IUPAC name
2-Methylpentane
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Other names
Isohexane
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Identifiers | |||
3D model (Jmol)
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1730735 | |||
ChEBI | |||
ChemSpider | |||
ECHA InfoCard | 100.003.204 | ||
EC Number | 203-523-4 | ||
MeSH | 2-methylpentane | ||
PubChem CID
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RTECS number | SA2985000 | ||
UNII | |||
UN number | 1208 | ||
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Properties | |||
C6H14 | |||
Molar mass | 86.18 g·mol−1 | ||
Appearance | Colorless liquid | ||
Odor | Odorless | ||
Density | 653 mg mL−1 | ||
Melting point | −160 to −146 °C; −256 to −231 °F; 113 to 127 K | ||
Boiling point | 60 to 62 °C; 140 to 143 °F; 333 to 335 K | ||
log P | 3.608 | ||
Vapor pressure | 46.7 kPa (at 37.7 °C) | ||
Henry's law
constant (kH) |
5.7 nmol Pa−1 kg−1 | ||
-75.26·10−6 cm3/mol | |||
Refractive index (nD)
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1.371 | ||
Thermochemistry | |||
194.19 J K−1 mol−1 | |||
Std molar
entropy (S |
290.58 J K−1 mol−1 | ||
Std enthalpy of
formation (ΔfH |
−205.3–−203.3 kJ mol−1 | ||
Hazards | |||
GHS pictograms | |||
GHS signal word | DANGER | ||
H225, H304, H315, H336, H411 | |||
P210, P261, P273, P301+310, P331 | |||
EU classification (DSD)
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F Xn N | ||
R-phrases | R11, R38, R51/53, R65, R67 | ||
S-phrases | (S2), S16, S29, S33 | ||
NFPA 704 | |||
Flash point | −7 °C (19 °F; 266 K) | ||
306 °C (583 °F; 579 K) | |||
Explosive limits | 1.2–7% | ||
US health exposure limits (NIOSH): | |||
PEL (Permissible)
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none | ||
Related compounds | |||
Related alkanes
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Related compounds
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2-Ethyl-1-butanol | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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what is ?) | (|||
Infobox references | |||
2-Methylpentane, trivially known as isohexane, is a branched-chain alkane with the molecular formula C6H14. It is a structural isomer of hexane composed of a methyl group bonded to the second carbon atom in a pentane chain.