H3AsO4, known as arsenic acid, is a chemical compound composed of arsenic, oxygen, and hydrogen. It appears as a colorless, odorless liquid and is highly soluble in water. Arsenic acid is a strong acid and can be used in various industrial applications, including the production of glass and as a reagent in chemical synthesis. In nature, arsenic acid can form from the oxidation of arsenic-containing minerals. It is important to handle this compound with care due to its toxicity and potential health risks associated with arsenic exposure, which is linked to various health issues, including cancer and skin lesions.