Acrylonitrile Butadiene Styrene (ABS) is BPA free. BPA stands for Bisphenol A, an industrial chemical that has been used in the production of various plastics since the 1950s. Despite its long history of use in plastics manufacturing, research has shown that BPA exposure can result in adverse effects of the human endocrine system. However, the levels of exposure to BPA in the day to day lives of most people is unlikely to cause any real harm.