ε-Caprolactone, oligomeric reaction products with 2,2'-oxydiethanol

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

6.29 µg/L

Assessment factor:

1 000

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

62.9 µg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.629 µg/L

Assessment factor:

10 000

Extrapolation method:

assessment factor

PNEC marine water (intermittent releases):

6.29 µg/L

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

832 mg/L

Assessment factor:

1

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

no hazard identified

Sediment (marine water)

Hazard assessment conclusion:

no hazard identified

Hazard for air

Air

Hazard assessment conclusion:

no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Conclusion on classification

The substance is readily biodegradable (90% in 28 days) with acute toxicity data available for three trophic levels. The weighted average Log Pow value is 1.8 and indicative of a low potential for bioaccumulation. The lowest acute toxicity value from the three trophic levels relates to the algal study with EC50 (growth rate) values determined to be 33.14 and 6.29 mg/l for the two components of the test substance. The test substance is not classified for the environment based on acute toxicity data (> 1 mg/l threshold for classification).

The laboratory reported <10% adverse effects on growth rate for the two components with calculated geometric mean 72-hour EC10 values of 3.21 mg/l and 0.71 mg/l (4.6 mg/l nominal concentration). Both values are not biologically relevant for adverse effects on algal growth with a mean inhibition of growth at 4.7%. A mean reduced growth rate of only 6% was seen at the next highest nominal concentration of 10 mg/l. Substance stability in the test medium is low and the algal EC10 results for the two components of the test substance are not considered to be adequate for classification. The substance is rapidly biodegradable (meets the 10-day window) and not considered to pose a long-term hazard to aquatic organisms. The acute toxicity data for the three trophic levels of organism are relied upon for classification and the substance is not classified for the environment.