There is no sanitizer that is used specifically for a mop bucket. Many people choose to use bleach.

Do you know where the mop is?

Mop this mess up now.

Someone stole my mop.

The top of a mop is called the head, or mop head.

Assuming you mean how do you use the word mop in a sentence, here is an example of mop as a verb. You need to mop the floor. An example of mop as a noun would look like this: That is a very dirty mop.

A floor cleaning product. Put it on the floor and mop it with a damp mop.