Chemical toilets are portable sanitation units that use chemicals to break down waste and control odors. They are commonly used at outdoor events, construction sites, and in areas without access to traditional plumbing. These toilets typically have a holding tank that contains a special solution to treat human waste. The design of a chemical toilet usually includes a seat, a privacy enclosure, and a flushing mechanism that uses a small amount of water or a chemical solution. Users can dispose of waste without the need for a sewer connection, making them a practical solution for temporary or remote locations.