2,2,4-Trimethylpentane

Iso-octane; trimethylpentane; C₈H₁₈ = 114.2 (540-84-1)

Colourless, flammable liquid, practically insoluble in water, soluble in anhydrous ethanol.

, 0.691 to 0.696; , 1.391 to 1.393.

Distillation range (2.2.11) Not less than 95% distils between 98° and 100°.

Trimethylpentane used in spectrophotometry complies with the following additional test.

Absorbance (2.2.25) Maximum 0.01 from 250 nm to 420 nm, determined using water as compensation liquid.