What state is a fumigant at room temperature?

Fumigants are substances used to eliminate pests by filling an area with vapor or gas. The key characteristic of a fumigant is that it exists in a gaseous state at room temperature, which enables it to penetrate into materials and structures effectively, such as soil, storage facilities, and buildings. This gaseous form allows for the rapid dispersal necessary to reach all areas where pests may be present, providing comprehensive coverage and efficacy.

In contrast, solids, liquids, and powders do not possess the same ability to fill a space as already existing gases. For example, solid fumigants would require heat or other processes to change to a gaseous state, which is not ideal for immediate application in pest control. By being a gas at room temperature, fumigants can work quickly and efficiently to eradicate unwanted pest populations.