Little Pro on 2017-05-25
PBT substances are substances that are Persistent, Bioaccumulative and Toxic (PBT). vPvB substances are substances that are very Persistent and very Bio-accumulative (vPvB). PBT substances and vPvB substances pose big threats to human health and the environment. When you register a chemical substance or identify its hazard, you often need to determine whether the substance belongs to a PBT substance or vPvB substance or not. In this article, we try to give you an overview and comparison of PBT and vPvB criteria in EU and USA.
In EU, PBT and vPvB criteria are set out in REACH annex XIII. In the US, EPA describes PBT criteria in the PBT category for Premanufacture Notices in the Category for Persistent, Bioaccumulative, and Toxic New Chemical Substances under TSCA and in the final rule for TRI reporting of PBT Chemicals . These criteria are used by the PBT Profiler to estimate PBT potential of chemicals.
The table below compares the PBT and vPvB criteria in EU and US. Substances are considered as PBT or vPvB substances when they fulfil the criteria for all three inherent properties P, B and T or both of the inherent properties vP and vB, respectively.
Item | REACH Annex XIII | EPA PBT Profiler * |
---|---|---|
P |
|
|
vP |
|
|
B |
|
|
vB |
|
|
T |
|
|
Note *:The criteria for T in PBT profiler does not consider health hazards. However, when EPA reviews a chemical for its PBT characteristics, they also consider potential human health effects due to environmental exposure in addition to aquatic toxicity.
Item | Screening level | High tier studies |
---|---|---|
P |
|
|
B |
|
|
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Certain substances fulfilling the PBT/vPvB criteria may also be eligible to be included in the Stockholm Convention on Persistent Organic Pollutants (POPs). Even if the criteria for identifying POPs are not exactly the same as the PBT/vPvB criteria, they do partly overlap. The POPs criteria also include potential for long-range transport as an additional criterion compared to the PBT/vPvB criteria.
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Tags: Topics - CRA, Environmental Risk Assessment