" Our lab analyzed WD-40 with gas chromatography (GC) and mass spectroscopy (MS).:

Mineral oil

Decane

Nonane

Tridecane and Undecane

Tetradecane

Dimethyl Naphthalene

Cyclohexane

Carbon Dioxide"

https://www.wired.com/2009/04/st-whatsinside-6/