Joe Pfeiffer writes:

That's not what the MSDS says.

Sure it does. If you know the nomenclature.

The bottom-end formulation of Liquid Wrench is mostly naphtha.

Probably not what you mean by "naphtha", such as VM&P naphtha.

One MSDS gives, "PETROLEUM MID-DISTILLATE, ALIPHATIC PETROLEUM NAPHTHA".

Aka "kerosene".