Polystyrene (PS) is a synthetic polymer that is widely used in various industries due to its unique properties. PS is lightweight, rigid, and transparent, making it an ideal material for packaging and disposable products such as cups, plates, and food containers. It is also used in the production of insulation materials, electronic components, and toys. PS is resistant to moisture and chemicals, making it suitable for use in harsh environments. However, it is not heat-resistant and can melt or deform under high temperatures. PS is not biodegradable and can take hundreds of years to decompose, making it an environmental concern. Despite this, PS remains a popular material due to its low cost and versatility.