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Lindane is a benzene compound that is used to kill body and pubic lice.
Lindane works by being absorbed into the louse's central nervous system, causing seizures and death.
The expiration date is on the tube, probably on the crimp.
Dutch chemist, developed insecticide "Lindane"
Lindane shampoo is sold over the counter. More in the link below on how and what to use.