and finally
Disteryldimethylammonium Chloride (a cationic detergent):
View attachment 650899
again, non polar tails, but a positively charged head (the ammonium group...Not shown is the balancing Cl- ion).This is a quaternary ammonium salt (four bonds on the N) or "Quat". These compounds have anti-static properties, mostly because they can hold water molecules at the surface and make it more conductive. If fact, this particular one is typically what you find in fabric softener and hair conditioner.