How long do pheromones last after applying? Effects faded after 3 hours

[ntk23]

Some estimates of various spray-phero half-lives by MarkL:

Successful Composition

The molecules definitely have different ‘weights’. However, all of these molecules must be fairly “light” – right? – or instead of floating on air currents, they would just fall to the floor. So, the first issue is how does stuff become “airborne” – you can have something which sublimates directly from solid to gas (like dry ice) or you can have a liquid which vaporizes (aka volatiles) like water (which slowly evaporates at room temperature) or alcohol (which evaporates much much faster.) And…