Odorless Mineral Spirits are a common substitute for turpentine in oil paints. They are less toxic by something like 1/3. They are also used in some cold wax concoctions, like Gamblin's cold wax medium.
Cold wax is generally not heated, but my interest is in a faux encaustic surface, so I've been using Dorland's cold wax, which purportedly does not use odorless mineral spirits (which have a low, dangerous, flash point, but rather uses resins). But I can't really find info on the particulars of the Dorland medium when it is heated.
Regardless, if you are doing encaustic or faux-encaustic paintings, the low flashpoint of odorless mineral spirits should be taken into account. It could be a safety hazard.