Phosphorus compounds are chemical substances that contain the element phosphorus, which is essential for life. These compounds can be found in various forms, including phosphates, which are commonly used in fertilizers to promote plant growth. Phosphorus is also a key component of DNA and RNA, playing a crucial role in genetic information transfer. In addition to their biological significance, phosphorus compounds are used in various industrial applications. For example, phosphoric acid is utilized in food processing and as a rust remover. Other phosphorus compounds, like phosphine, are used in the production of semiconductors and as pesticides.