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Cetane Number [1]

A number assigned to motor fuel to represent its properties of ignition. Pure cetane has been given a rating of 100. Diesel  [2]fuel is routinely tested for its cetane rating. If it has a low rating, additional cetane, along with other chemicals, can be blended into the fuel to bring it up to the desired rating.

 
Source URL (modified on 10/13/2014): https://testing.pei.org/wiki/cetane-number

Links
[1] https://testing.pei.org/wiki/cetane-number
[2] https://testing.pei.org/node/253