Paradichlorobenzene is a chlorinated aromatic hydrocarbon. It is a fumigant insecticide and repellent. Paradichlorobenzene turns directly from a solid into a gas, a process called sublimation. The target organisms are molds, mildews, and insects, but paradichlorobenzene can also be toxic to people and other animals. Most pesticide products containing paradichlorobenzene in the U.S. are used to control clothes moths in airtight containers. Paradichlorobenzene was first registered for use in the United States in 1942, and it is sometimes called 1,4-dichlorobenzene.

Triethylene glycol is used in the vapor state as an air-sterilizing agent, toxic to bacteria, fungi and viruses in low concentrations in air. It is used in cosmetics as a fragrance ingredient and as a viscosity-decreasing agent. Commercially available triethylene glycol increased non-rapid eye movement sleep in mice in a dose-dependent manner. These results clearly demonstrated that triethylene glycol could potentially be useful for insomnia therapy. Triethylene glycol is used for occasional constipation and other conditions.