PBT substance

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A PBT substance is a chemical substance that is persistent , bioaccumulative and toxic according to the criteria in Annex XIII of the REACH regulation according to Article 57d. In Article 6a of the Swiss Chemicals Ordinance, reference is made to the REACH Ordinance.

PBT substances are of concern because they have the potential to accumulate in remote ecosystems . The original (uncontaminated) state is difficult to restore and avoiding emissions only leads to a slow decline in environmental concentrations due to the long half-lives . In addition, the long-term effects and behavior of PBT substances are difficult to predict.

definition

The following criteria for P, B and T must be met:

Persistence (P) Bioaccumulation (B) Toxicity (T)
Criteria
(or linked) 		Half-life:
• in sea water> 60 days
• in fresh water or estuaries> 40 days
• in sea sediment> 180 days
• in fresh water or estuary sediment > 120 days
• in the soil> 120 days 		BCF > 2000 • NOEC / EC10 for marine or freshwater organisms <0.01 mg / l
• Classification as carcinogenic (Category 1A or 1B), germ cell mutagenic (Category 1A or 1B) or toxic for reproduction (Category 1A, 1B or 2)
• Other evidence of chronic toxicity which, according to Regulation (EC) No. 1272/2008, is classified as specific target organ toxicity (repeated exposure), Category 1 (oral, dermal, inhalation of gases / vapors, inhalation of dust / mist / smoke) or Category 2 ( oral, dermal, inhalation of gases / vapors, inhalation of dust / mist / smoke)

Substances that meet these criteria can be included in the list of substances of very high concern and later, if necessary, in Annex XIV of REACH (list of substances subject to authorization).

See also

literature

  • ECHA : Guidance on information requirements and chemical safety assessment - Chapter R.11: PBT / vPvB Assessment. 2017 ( long version , short version ).

Web links

Individual evidence

  1. ↑ a b REACH regulation (PDF) , consolidated version, Article 57d or Annex XIII.
  2. ↑ Ordinance on protection against dangerous substances and preparations (Chemicals Ordinance, ChemV) , Article 6a.
  3. ↑ PBT assessment , Eric Verbruggen ( RIVM ), 2015.