A chemical toilet is like a little potty that you can use when you're out and about and there's no regular toilet nearby. It's called a "chemical" toilet because it uses special chemicals to clean up your pee and poop.
When you go pee or poop in a chemical toilet, you push a button or pull a lever to make the chemicals go into the toilet bowl. These chemicals help break down your waste and make it not smelly.
After you're done, you close the toilet lid and push a button or pull a lever again. This time, the chemicals mix with some water and help clean the bowl. Then, you can open the lid again and the toilet is all clean and ready for the next person to use.
Later, when someone comes to empty the toilet, they take out a tank that's full of all the waste and chemicals. They usually wear special gloves and masks to do this so they don't get any germs on them. Then they take the tank to a special place where they can dump out the waste and clean the tank really well.
Overall, a chemical toilet helps us have a way to go potty when we're away from home and keeps the environment clean by breaking down the waste with special chemicals.