Question # 249

249. Does the de minimis exemption apply regardless of whether a listed non-PBT chemical is present in a mixture as an impurity or separated out as a byproduct? Does it apply to toxic chemicals in waste?
The de minimis exemption may be considered for non-PBT chemicals that are manufactured as impurities that remain in the product for distribution. The de minimis exemption does not apply to listed toxic chemicals that are manufactured as a byproduct regardless of whether the byproduct is a waste.