Question # 537

537. Are toxic chemical monomers such as acrylonitrile, butadiene and styrene, which are contained in a plastic copolymer known as ABS, reportable under Section 313?
These chemicals are monomers that react to make the ABS copolymer that is not reportable under Section 313 (see 40 CFR Section 372.65). However, if any unreacted acrylonitrile, butadiene, or styrene monomers are present in the ABS copolymer in excess of de minimis concentrations then they are reportable.

Additional Details