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| 融点 | -154 °C (lit.) | | 沸点 | 62 °C (lit.) | | 比重(密度) | 0.653 g/mL at 25 °C (lit.) | | 蒸気密度 | 3 (vs air) | | 蒸気圧 | 6.77 psi ( 37.7 °C) | | 屈折率 | n20/D 1.371(lit.) | | 闪点 | −10 °F | | 貯蔵温度 | Store below +30°C. | | 溶解性 | 0.14g/l | | 外見 | Liquid | | 色 | Clear colorless | | 爆発限界(explosive limit) | 1.2-7.4%(V) | | 臭気閾値(Odor Threshold) | 7ppm | | 水溶解度 | Miscible with alcohol, ether, acetone and chloroform. Immiscible with water. | | BRN | 1730735 | | Henry's Law Constant | 0.697, 0.694, 0.633, 0.825, and 0.848 (atm?m3/mol)at 10, 15, 20, 25, and 30 °C, respectively (EPICS, Ashworth
et al., 1988) | | 暴露限界値 | ACGIH TLV: TWA and STEL for all isomers except n-hexane are 500 and
1,000 ppm, respectively (adopted). | | Dielectric constant | 1.8899999999999999 | | 安定性： | Stable. Highly flammable. Gas/vapour mixtures explosive at some concentrations. | | LogP | 3.214 at 25℃ and pH7 | | CAS データベース | 107-83-5(CAS DataBase Reference) | | EPAの化学物質情報 | 2-Methylpentane (107-83-5) |
| | 2-メチルペンタン Usage And Synthesis |
| 外観 | 無色～ほとんど無色, 澄明の液体 | | 溶解性 | 水に不溶, エタノール, エーテルに易溶。エタノール及びアセトンに極めて溶けやすく、水にほとんど溶けない。 | | 用途 | 溶剤、クリーナー添加剤。 | | 用途 | 医薬原料,接着剤?クリーナー溶剤,重合溶媒等 (NITE CHRIP) | | 用途 | 溶剤、有機合成原料。 | | 主な用途／役割 | 溶剤型接着剤、エマルション系接着剤、エアゾール接着剤に使用される。 | | 化学的特性 | colourless liquid | | 化学的特性 | 2-Methylpentane (isohexane), C6H14, is a flammable liquid
with a specific gravity of 0.653. It occurs naturally in petroleum
and gas and as a plant volatile. It is found in sources
associated with petroleum products such as petroleum manufacture,
natural gas, turbines, and automobiles. | | 物理的性質 | Clear, colorless, very flammable liquid with an odor similar to hexane. An odor threshold
concentration of 8.9 ppmv was reported by Nagata and Takeuchi (1990). | | 使用 | Organic synthesis, solvent. | | 使用 | 2-Methylpentane is employed as a raw material, rubber solvent and vegetable oil extraction solvent. It is also used as a solvent in adhesives. Further, it is used as an intermediate in organic synthesis and finds application in food, preservatives, cosmetics, pharmaceuticals, beverages and flavor enhancer. | | 使用 | 2-Methylpentane is mainly used in studies involving the functionalization of aliphatic C–H bonds using different carbene insertion processes to form C–H insertion products. The metal-free Ritter-type amination reaction of tertiary C–H bond using iodic acid as an oxidant in the presence of N-hydroxyphthalimide has also been reported. | | 定義 | ChEBI: 2-Methylpentane is an alkane. | | 調製方法 | Isohexane is manufactured by fractional distillation of
gasoline derived from crude oil or liquid product derived
from natural gas. | | 一般的な説明 | Watery liquid with a gasoline-like odor, Floats on water. Produces an irritating vapor. | | 空気と水の反応 | Highly flammable. | | 反応プロフィール | Saturated aliphatic hydrocarbons, such as ISOHEXENE, may be incompatible with strong oxidizing agents like nitric acid. Charring of the hydrocarbon may occur followed by ignition of unreacted hydrocarbon and other nearby combustibles. In other settings, aliphatic saturated hydrocarbons are mostly unreactive. They are not affected by aqueous solutions of acids, alkalis, most oxidizing agents, and most reducing agents. | | 危険性 | Flammable, dangerous fire risk, reacts vig-orously with oxidizing materials. | | 健康ハザード | Inhalation causes irritation of respiratory tract, cough, mild depression, cardiac arrhythmias. Aspiration causes severe lung irritation, coughing, pulmonary edema; excitement followed by depression. Ingestion causes nausea, vomiting, swelling of abdomen, headache, depression. | | Source | Schauer et al. (1999) reported 2-methylpentane in a diesel-powered medium-duty truck
exhaust at an emission rate of 930 μg/km.
A constituent in gasoline. Harley et al. (2000) analyzed the headspace vapors of three grades of
unleaded gasoline where ethanol was added to replace methyl tert-butyl ether. The gasoline vapor
concentrations of 2-methylpentane in the headspace were 9.3 wt % for regular grade, 9.8 wt % for mid-grade, and 10.4 wt % for premium grade.
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 2-methylpentane was 8.6 mg/kg of pine burned. Emission rates of 2-methylpentane were
not measured during the combustion of oak and eucalyptus.
California Phase II reformulated gasoline contained 2-methylpentane at a concentration of 36.9
g/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without
catalytic converters were 6.31 and 827 mg/km, respectively (Schauer et al., 2002).
Reported as an impurity (0.1 wt %) in 99.0–99.7 wt % 2,3-dimethylbutane (Chevron Phillips,
2004). | | 環境運命予測 | Photolytic. When synthetic air containing gaseous nitrous acid and 2-methylpentane was
exposed to artificial sunlight (λ = 300–450 nm), acetone, propionaldehyde, peroxyacetal nitrate,
peroxypropionyl nitrate, and possibly two isomers of hexyl nitrate and propyl nitrate formed as
products (Cox et al., 1980).
Based on a photooxidation rate constant of 5.6 x 10-12 cm3/molecule?sec for the reaction of 2-
methylpentane and OH radicals, the atmospheric lifetime is 25 h (Altshuller, 1991).
Chemical/Physical: Complete combustion in air yields carbon dioxide and water vapor. 2-
Methylpentane will not hydrolyze because it does not contain a hydrolyzable functional group. | | 純化方法 | Purify it by azeotropic distillation with MeOH, followed by washing out the MeOH with water, drying (CaCl2, then sodium), and distilling it. [Forziati et al. J Res Nat Bur Stand 36 129 1946.] |
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