Octane

Structural formula
General
Surname	Octane
other names	n- octane; octane; n octane; OCTANE ( INCI ) ;
Molecular formula	C 8 H 18
Brief description	colorless liquid
External identifiers / databases
EC number	203-892-1
ECHA InfoCard	100.003.539
PubChem	356
ChemSpider	349
Wikidata	Q150681
properties
Molar mass	114.23 g mol −1
Physical state	liquid
density	0.70 g cm −3
Melting point	−57 ° C
boiling point	126 ° C
Vapor pressure	14 h Pa (20 ° C); 24.6 hPa (30 ° C); 41.5 hPa (40 ° C); 67.2 hPa (50 ° C);
solubility	0.7 mg l −1 in water (20 ° C)
Refractive index	1.3980
safety instructions
H and P phrases	H: 225-304-315-336-410
	P: 210-273-301 + 330 + 331-302 + 352
MAK	2400 mg m −3
	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

Octane is a colorless liquid that belongs to the alkanes .

In chemistry it is written as octane in accordance with the current nomenclature rules , but in Germany - especially in connection with the octane number - the outdated notation octane is preferred. It is the unbranched representative of the 18 isomers of octanes .

properties

Octane is a clear, colorless liquid with a boiling point of 126 ° C. Only 0.7 mg / l are soluble in water. It occurs as a component of petroleum and is hazardous to water ( WGK 2 ).

Safety-related parameters

Octane forms flammable vapor-air mixtures. The compound has a flash point of 12 ° C. The explosion range is between 0.8% by volume (38 g / m ³ ) as the lower explosion limit (LEL) and 6.5% by volume (310 g / m ³ ) as the upper explosion limit (UEL). According to the vapor pressure function, the lower explosion point is 11 ° C. The limit gap width was determined to be 0.89 mm. This results in an assignment to explosion group IIA. The ignition temperature is 205 ° C. The substance therefore falls into temperature class T3.

Note

The knock resistance of petrol is indicated using the octane number. Contrary to what the name suggests, it is not named octane, but rather the isomer with the common name iso- octane ( 2,2,4-trimethylpentane ), which by definition corresponds to an octane number of 100.

Individual evidence

↑ Entry on OCTANE in the CosIng database of the EU Commission, accessed on May 24, 2020.
↑ ^a ^b entry on octane. In: Römpp Online . Georg Thieme Verlag, accessed on September 29, 2014.
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r Entry on octane in the GESTIS substance database of the IFA , accessed on June 26, 2017(JavaScript required) .
↑ Entry on Octane in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
^ ^A ^b ^c ^d E. Brandes, W. Möller: Safety-related parameters - Volume 1: Flammable liquids and gases , Wirtschaftsverlag NW - Verlag für neue Wissenschaft GmbH, Bremerhaven 2003.

Web links

Commons : Octan - collection of pictures, videos and audio files

Wiktionary: Octane - explanations of meanings, word origins, synonyms, translations

[CosIng-1] Entry on OCTANE in the CosIng database of the EU Commission, accessed on May 24, 2020.

[roempp-2] try on octane. In: Römpp Online . Georg Thieme Verlag, accessed on September 29, 2014.

[GESTIS-3] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r Entry on octane in the GESTIS substance database of the IFA , accessed on June 26, 2017(JavaScript required) .

[CLP_100.003.539-4] Entry on Octane in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .

[Brandes-5] A ^b ^c ^d E. Brandes, W. Möller: Safety-related parameters - Volume 1: Flammable liquids and gases , Wirtschaftsverlag NW - Verlag für neue Wissenschaft GmbH, Bremerhaven 2003.