Registration Dossier

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
51.8 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
6.84 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
5.18 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
4 mg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
207 mg/kg sediment dw
Assessment factor:
1
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
20.7 mg/kg sediment dw
Assessment factor:
1
Extrapolation method:
equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
10 mg/kg soil dw
Assessment factor:
100
Extrapolation method:
assessment factor

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Since the linear N-C16-18 (evennumbered) C18 unsaturated dipropylene triamines and tripropylenetetraamines are poorly soluble in water, and as they are positively charged under environmental conditions, it is very likely that they adsorb soil, sediment and other negatively charged surfaces. The results of ecotoxicity testing in synthetic growth media are therefore influenced by secondary effects like sorption to glassware. In order to reduce the influence of these secondary effects, modifications such as river water tests (or tests in the presence of humic acids) can be introduced as stabilizer of the test substances which limit the sorption glassware and at the same time creates more realistic conditions. These studies should therefore be considered as higher tier studies.

For the aquatic risk assessment of strongly sorbing substances the current REACHGuidance Documentsdo not provide sufficient guidance concerning both effects and exposure assessment. The best and most realistic alternative for strongly sorbing substances is the PEC/PNECaquatic bulkapproach (ECETOC 2003). This approach is based on a PNECaquatic bulkwhich is derived from a modified ecotoxicity test using humic acid, natural water or effluent and a PEClocal, aquatic bulkwhich represents the total aquatic concentration (dissolved and sorbed = bulk). The risk quotient for the aquatic compartment is calculated by using nominal concentrations.

Conclusion on classification

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