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Hi Alan, what in heaven's name is "painter's syndrome" ?!?
I suppose a petroleum chemist would be familiar with "isoparaffin 222". Here's the deal. Mineral spirits in all its grades and species is a petroleum distillate, and an aromatic hydrocarbon. Breathe enough of it, and you'll get sick.
IMO, there is only one acceptable "turpentine" for oil painting, and that is the distillate of gum collected from Georgia (USA) pines, and in previous times from similar conifers in Portugal.
To the best of my knowledge, no one has removed the odor from pure spirits of gum turpentine. Why would you ? It doesn't smell bad, and most of these materials nowadays are going into air-fresheners and cleaning compounds so that they will smell "pine fresh".
Turpenoid is not a "natural" (vegetable, if you will) solvent, but a mineral spirits variant.
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