Styrene-acrylonitrile (SAN) is a type of thermoplastic polymer made from the copolymerization of styrene and acrylonitrile. It is known for its excellent clarity, strength, and resistance to heat and chemicals, making it suitable for various applications, including automotive parts, household items, and electronic components. SAN is often used as a substitute for polycarbonate in products that require transparency and durability. Its properties can be enhanced by blending it with other materials, allowing for a wide range of uses in industries such as packaging, consumer goods, and construction.