ABS is stable to decomposition under normal use and polymer processing conditions with exposure to carcinogens well below workplace exposure limits. However, at higher temperatures (400 °C) it can decompose into its
constituents: butadiene (carcinogenic to humans), acrylonitrile
(possibly carcinogenic to humans), and styrene.
ABS plastic ground down to an average diameter of less than 1 micrometer is used as the colorant in some tattoo inks. Tattoo inks that use it are extremely vivid.