Why can I smell butane lol?

This has been bugging me for a while lol. If butane is odorless then why can I smell it when it is boiling off?

Hopefully u guys know I’m not talking about the rotten egg odor added to some tanks for leak detection. My tanks are “non-odorized”. I seem to notice the same smell whether I’m using straight n-tane, tri-blend, or propane

Could it be contaminates I’m smelling? Or maybe some kind of reaction going on in my nose lol? Is “odorless” a loose or relative term lol?

Please someone help me :joy:

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hydrocarbons still have smells.
propane butane pentane hexane heptane all smell slightly different.

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Good to know I’m not insane :joy:

Hydrocarbons have a smell to them…I’ve used hplc grade hydrocarbons in my masters and they had distinct smells

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