It's mostly particles. Many companies with clean manufacturing like pharma and semiconductor require their employees to change and shower if they've been in the presence of smokers, or even barbeque. It's easy to see on particle counters if people are complying.
boogerfact t1_iy15y7m wrote
Reply to comment by Strange_Coat_8375 in Indoor Secondary Pollutants Cannot Be Ignored: Third-Hand Smoke by Godzilla_KOM
Ha ha sorry, I don't know what else they're called, just give numbers of particles in air.