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Octane

From Academic Kids

This article is about the real-life chemical compound. For the Transformers character, see Octane (Transformers).
Octane
General
Molecular formula C8H18
CAS number 111-65-9
EC number 203-892-1
Annex I Index number 601-009-00-8
Physical characteristics
Appearance Colourless liquid
Melting point -57 Celsius
Boiling point 126 Celsius
Vapour density -
Vapour pressure 11 mm Hg at 20 Celsius
Specific gravity 0.703
Flash point 15 Celsius (closed cup)
Explosion limits 0.96 - 6.5 %
Autoignition temperature 220 Celsius
Critical temperature 295.7 Celsius

Octane is an alkane hydrocarbon with the chemical formula CH3(CH2)6CH3. It has many isomers.

One of the isomers, iso-octane or 2,2,4-Trimethylpentane, is of major importance, as it has been selected as the 100 point on the octane rating scale, with n-heptane as the zero point. Octane ratings are ratings used to represent the anti-knock performance of petrol, given as the percentage of 2,2,4-trimethylpentane in an 2,2,4-trimethylpentane / n-heptane mixture that would have the same performance. It is an important constituent of gasoline.

See also

External links


 
Alkanes

methane
CH4

|
 

ethane
C2H6

|
 

propane
C3H8

|
 

butane
C4H10

|
 

pentane
C5H12

|
 

hexane
C6H14

heptane
C7H16

|
 

octane
C8H18

|
 

nonane
C9H20

|
 

decane
C10H22

|
 

undecane
C11H24

|
 

dodecane
C12H26

 

tridecane
C13H28

|
 

tetradecane
C14H30

|
 

pentadecane
C15H32

|
 

hexadecane
C16H34

|
 

heptadecane
C17H36

|
 

octadecane
C18H38

 

nonadecane
C19H40

|
 

eicosane
C20H42

|
 

heneicosane
C21H44

|
 

docosane
C22H46

|
 

tricosane
C23H48

|
 

tetracosane
C24H50

 

pentacosane
C25H52

|
 

hexacosane
C26H54

|
 

heptacosane
C27H56

|
 

octacosane
C28H58

|
 

nonacosane
C29H60

|
 

triacontane
C30H62

 

hentriacontane
C31H64

|
 

dotriacontane
C32H66

|
 

tritriacontane
C33H68

|
 

tetratriacontane
C34H70

|
 

pentatriacontane
C35H72

|
 

hexatriacontane
C36H74

 

de:Oktan

eo:Oktano fr:Octane nl:Octaan ja:オクタン sv:Oktan

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