Arsenicals are chemical compounds that contain the element arsenic. They can be found in various forms, including organic and inorganic compounds. Inorganic arsenicals, such as arsenic trioxide, are often used in industrial processes, while organic arsenicals are commonly found in some pesticides and herbicides. These compounds have been studied for their potential effects on human health, as exposure to high levels of arsenicals can lead to serious health issues, including skin lesions, respiratory problems, and an increased risk of certain cancers. Regulatory agencies monitor arsenical levels in the environment to protect public health.