Octane 145997 223843361 2008-07-06T02:54:17Z DaughterofSun 6715754 interwiki {{two other uses||the gasoline rating system|Octane rating}} {{Chembox new | Name = Octane | ImageFile = Octane-2D-Skeletal.svg | ImageFile1 = Octane-3D-balls.png | Section1 = {{Chembox Identifiers | SMILES = CCCCCCCC | CASNo = 111-65-9 | RTECS = RG8400000 }} | Section2 = {{Chembox Properties | Formula = C<sub>8</sub>H<sub>18</sub> | MolarMass = 114.2285 g/mol | Appearance = colorless liquid | Density = 0.703 g/ml, liquid | Solubility = Immiscible | MeltingPt = &minus;57 °C (216 K) | BoilingPt = 125.52 °C (398.7 K) | Viscosity = 0.542 [[Poise|cP]] at 20 °C }} | Section4 = {{Chembox Thermochemistry | DeltaHf = &minus;250 kJ/mol | DeltaHc = &minus;5430 kJ/mol }} | Section7 = {{Chembox Hazards | EUClass = Flammable ('''F''')<br />Harmful ('''Xn''')<br />Dangerous for<br />the environment ('''N''') | RPhrases = {{R11}}, {{R38}}, {{R50/53}},<br />{{R65}}, {{R67}} | SPhrases = {{S2}}, {{S9}}, {{S16}}, {{S29}}, {{S33}},<br />{{S60}}, {{S61}}, {{S62}} | FlashPt = 13 °C | Autoignition = 220 °C }} | Section8 = {{Chembox Related | Function = [[alkane]]s | OtherFunctn = [[Heptane]]<br />[[2,2,4-Trimethylpentane]]}} }} '''Octane''' is a straight-chain [[alkane]] with the [[chemical formula]] CH<sub>3</sub>(CH<sub>2</sub>)<sub>6</sub>CH<sub>3</sub>. Octane has 18 structural [[isomer]]s: * Octane (''n''-octane) * [[2-Methylheptane]] * [[3-Methylheptane]] ([[chirality (chemistry)|chiral]]) * [[4-Methylheptane]] * [[3-Ethylhexane]] * [[2,2-Dimethylhexane]] * [[2,3-Dimethylhexane]] (chiral) * [[2,4-Dimethylhexane]] (chiral) * [[2,5-Dimethylhexane]] * [[3,3-Dimethylhexane]] * [[3,4-Dimethylhexane]] (chiral, or [[meso compound]]) * [[2-Methyl-3-ethylpentane]] * [[3-Methyl-3-ethylpentane]] * [[2,2,3-Trimethylpentane]] (chiral) * [[2,2,4-Trimethylpentane|2,2,4-Trimethylpentane (isooctane)]] * [[2,3,3-Trimethylpentane]] * [[2,3,4-Trimethylpentane]] * [[2,2,3,3-Tetramethylbutane]] ==References== {{unreferenced|date=October 2007}} ==External links== * {{ICSC|0933|09}} (''n''-octane) * {{PGCH|0470}} * [http://physchem.ox.ac.uk/MSDS/OC/octane.html Material Safety Data Sheet for Octane] * [http://ars-grin.gov/cgi-bin/duke/chemical.pl?OCTANE Phytochemical database entry] * [http://cheric.org/kdb/kdb/hcprop/showprop.php?cmpid=8 Chemical and physical properties table] {{alkanes}} [[Category:Alkanes]] [[ar:أوكتان]] [[bs:Oktan]] [[ca:Octà]] [[da:Octan]] [[de:Octan]] [[es:Octano]] [[eo:Oktano]] [[fr:Octane]] [[ko:옥테인]] [[ku:Oktan]] [[lv:Oktāns]] [[hu:Oktán]] [[nl:Octaan]] [[ja:オクタン]] [[no:Oktan]] [[pl:Oktan]] [[pms:Otan]] [[pt:Octano]] [[ru:Октан]] [[sr:Октан]] [[fi:Oktaani (kemia)]] [[sv:Oktan]] [[vi:Octan]] [[tl:Octane]] [[tr:Oktan]] [[zh:辛烷]]