PBT Chemical (Definition)

A PBT chemical is persistent (resists degradation), bioaccumulative (builds up in organisms), and toxic (causes adverse effects). TSCA Section 6(h) requires expedited action to reduce exposure to the extent practicable. Five chemicals are currently regulated.

TSCA § 6(h); Lautenberg Act (2016).

PBT classification triggers the expedited Section 6(h) pathway—faster action with fewer procedural safeguards and no cost-benefit requirement.

EPA identified DecaBDE as meeting all three PBT criteria, enabling regulation through the expedited Section 6(h) pathway.