This will be better provided by demulsifier suppliers such as Nalco, GE Betz, Baker-Hughes and the like. To my experience, many of the demulsifier carrier solvents are/were napthenic-based aromatics.....this may very well have changed over the past years.
I would suggest, however, that that demulsifier formulations have been used for 50 or more years in hot climates such as yours, and should not be of concern to you assuming normal and prudent product storage precautions are taken.
Orenda