[1] Larger acrylonitrile content improves mechanical properties and chemical resistance, but also adds a yellow tint to the normally transparent plastic.

The copolymer has a glass transition temperature greater than 100 °C owing to the acrylonitrile units in the chain, thus making the material resistant to boiling water.

It is structurally related to ABS plastic, where polybutadiene is copolymerised with SAN to give a much tougher material.

When the product is stressed, crazing from the particles helps to increase the strength of the polymer.

Uses include food containers, water bottles, kitchenware, e.g., blenders and mixers, healthcare materials, cosmetic jars, computer products, packaging material, household equipment e.g., shower trays, battery cases and plastic optical fibers.