2-methylheptane

Structural formula
General
Surname	2-methylheptane
other names	Isooctane
Molecular formula	C 8 H 18
Brief description	colorless liquid
External identifiers / databases
EC number	209-747-9
ECHA InfoCard	100,008,863
PubChem	11594
Wikidata	Q2493733
properties
Molar mass	114.23 g mol −1
Physical state	liquid
density	0.70 g cm −3
Melting point	approx. −110 ° C
boiling point	117 ° C
Vapor pressure	95 hPa (50 ° C)
solubility	practically insoluble in water (0.75 mg l −1 at 25 ° C); soluble in ethanol;
Refractive index	1.395 (20 ° C)
safety instructions
H and P phrases	H: 225-304-315-336-410
	P: 210-261-273-301 + 310-331-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

2-methylheptane is a chemical compound from the group of aliphatic , saturated hydrocarbons . It is a structural isomer of octane .

Occurrence

2-methylheptane is found naturally in some green and roasted coffee beans.

Extraction and presentation

2-Methylheptane can be obtained by reacting 1-bromo-2-methylpropane with lithium dibutylcuprate in ether.

properties

2-methylheptane is an easily flammable colorless liquid that is practically insoluble in water. It decomposes when heated.

use

2-methylheptane is used as a gas detector, for example in the RD DIN40 respiratory mask with type A gas filter.

safety instructions

The vapors of 2-methylheptane can form an explosive mixture with air. The compound has a flash point of 6 ° C. The explosion range is between 0.8% by volume (40 g / m ³ ) as the lower explosion limit (LEL) and 6.5% by volume (310 g / m ³ ) as the upper explosion limit (UEL).

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 2-methylheptane in the GESTIS substance database of the IFA , accessed on April 5, 2017(JavaScript required) .
↑ ^a ^b Data sheet 2-Methylheptane, 99% from AlfaAesar, accessed on April 5, 2017 ( PDF )(JavaScript required) .
↑ Data sheet 2-methylheptane, 98% from Sigma-Aldrich , accessed on April 5, 2017 ( PDF ).
↑ Entry on 2-methylheptane in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on April 5, 2017. Manufacturers or distributors can expand the harmonized classification and labeling .
^ Ivon Flament, Yvonne Bessière-Thomas: Coffee Flavor Chemistry . John Wiley & Sons, 2002, ISBN 978-0-471-72038-6 , pp. 87 ( limited preview in Google Book search).
↑ Michael B. Smith: Organic Chemistry An Acid-Base Approach, Second Edition . CRC Press, 2016, ISBN 978-1-4822-3826-6 , pp. 563 ( limited preview in Google Book search).

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l Entry on 2-methylheptane in the GESTIS substance database of the IFA , accessed on April 5, 2017(JavaScript required) .

[Alfa-2] Data sheet 2-Methylheptane, 99% from AlfaAesar, accessed on April 5, 2017 ( PDF )(JavaScript required) .

[Sigma-3] Data sheet 2-methylheptane, 98% from Sigma-Aldrich , accessed on April 5, 2017 ( PDF ).

[CLP_100.008.863-4] Entry on 2-methylheptane in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on April 5, 2017. Manufacturers or distributors can expand the harmonized classification and labeling .

[Ivon_Flament,_Yvonne_Bessière-Thomas-5] Ivon Flament, Yvonne Bessière-Thomas: Coffee Flavor Chemistry . John Wiley & Sons, 2002, ISBN 978-0-471-72038-6 , pp. 87 ( limited preview in Google Book search).

[Michael_B._Smith-6] Michael B. Smith: Organic Chemistry An Acid-Base Approach, Second Edition . CRC Press, 2016, ISBN 978-1-4822-3826-6 , pp. 563 ( limited preview in Google Book search).