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$\begingroup$ Hi, to clarify I don't think the ingredients are any particular order - the pyrethroids tend to be about 1-2% of the volume of any such product, but I'm sure that the 'water-based' products from both Indonesia and the Philippines are mostly water. I'm not sure if the electric vaporiser product also contains water, it's possible they wouldn't indicate it in the list of ingredients (which are 'what's inside', not a 'full list of ingredients'). Presumably it would ignite easily if the solvent is a petroleum fraction? $\endgroup$
– thelawnet
Commented Oct 19, 2020 at 16:48
$\begingroup$ While it does seem reasonable that the water-based product might not work well in a device designed to create vapour from a petroleum-based solution, I don't think you mentioned whether it is reasonable to suppose there might be significant differences between a product designed to be 'sprayed', containing pyrethroids dissolved in petroleum, and a product designed to be evaporated, also containing pyrethroids dissolved in petroleum? In both cases presumably it's desirable for the spray to disperse effectively in air? $\endgroup$
– thelawnet
Commented Oct 19, 2020 at 16:53
$\begingroup$ Just because «A» contains much of water (plus the detergent and alcohol) doesn't make it better or worse than petroleum-based formulation «B». While ignition of the petroleum of course depends on the amount of energy delivered, there is an interest to use a fraction of petroleum which does not evaporate not too quickly (not as quick as, say acetone); otherwise, the consumers are occupied with refilling the devices too often to see a benefit in the installation of the devices. And yes, the finer air-dispersed, the more effective (actually both against insects and you [lungs, skin, eyes], too). $\endgroup$
– Buttonwood
Commented Oct 22, 2020 at 20:49

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