Hand sanitizer is actually an extremely hazardous substance! It is very flammable and that does not mix well at a landfill. Dumping large amounts of hand sanitizer will quickly lead to combustion.
If you have small household amounts of hand sanitizer, you can place the hand sanitizer inside of your trash can.
If you have a large amount, go ahead and give these guys a call. Clean Management Environmental Group will give you a free quote to get rid of it!