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[X1ANNEX XIII U.K. CRITERIA FOR THE IDENTIFICATION OF PERSISTENT, BIOACCUMULATIVE AND TOXIC SUBSTANCES, AND VERY PERSISTENT AND VERY BIOACCUMULATIVE SUBSTANCES

1. PBT-SUBSTANCES U.K.

A substance that fulfils all three of the criteria of the sections below is a PBT substance.

1.1. Persistence U.K.

A substance fulfils the persistence criterion (P-) when:

The assessment of the persistency in the environment shall be based on available half-life data collected under the adequate conditions, which shall be described by the registrant.

1.2. Bioaccumulation U.K.

A substance fulfils the bioaccumulation criterion (B-) when:

The assessment of bioaccumulation shall be based on measured data on bioconcentration in aquatic species. Data from freshwater as well as marine water species can be used.

1.3. Toxicity U.K.

A substance fulfils the toxicity criterion (T-) when: