Ditetradecyl peroxydicarbonate

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

4.47 µg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.447 µg/L

Assessment factor:

100

Extrapolation method:

assessment factor

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

100 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

191.316 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

19.132 mg/kg sediment dw

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:

38.032 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential to cause toxic effects if accumulated (in higher organisms) via the food chain

Additional information

The PNEC derivation was as follows justified:

PNEC freshwater sediment:

K_(susp-water) = 10700

RHO_(susp) = 1150

Conversion factor (wwt -> dwt): 4.6

PNEC_freshwater sediment

= (K_(susp-water) / RHO_(susp)) * PNEC_water * 1000

= (10700/1150) * 0.00447 * 1000

= 41.59 mg/kg wwt

= 191.316 mg/kg dw

 

PNEC marine water sediment:

K_(susp-water) = 1.25

RHO_(susp) = 1150

Conversion factor (wwt -> dwt): 4.6

PNEC_marine water sediment

= (K_(susp-water) / RHO_(susp)) * PNEC_marine water * 1000

= (10700/1150) * 0.000447 * 1000

= 4.159 mg/kg wwt

= 19.1316 mg/kg dw

 

PNEC soil:

K_(soil-water) = 12800

RHO_(soil) = 1700

Conversion factor (wwt -> dwt): 1.13

PNEC_soil

= (K_(soil-water) / RHO_(soil)) * PNEC_freshwater * 1000

= (12800/1700) * 0.00447 * 1000

= 33.6565 mg/kg wwt

= 38.0318 mg/kg dw

Conclusion on classification

Acute aquatic toxicity:

96 h, LC50 (Danio rerio): >100 mg/L (nominal concentration)

48 h, EC50 (Daphnia magna): >100 mg/L (nominal concentration)

72 h, ErC50 (Pseudokirchneriella subcapitata): >100 mg/L (nominal concentration)

 

Aquatic chronic toxicity:

72 h, ErC10 (Pseudokirchneriella subcapitata): >100 mg/L (nominal concentration)

21 d, NOEC (Daphnia magna): 44.7 µg/L (time weighted average measured concentration)

35 d, NOEC (Danio rerio): >=403 µg/L (mean measured concentration)

Biodegradation: readily biodegradable: 65 % after 28 days (% degradation O2 consumption, OECD 301 D)

Partition coefficient: log Kow = >6.5 at 20 °C (estimated: 13 at 25 °C)

 

Classification according to CLP

The available experimental test data are reliable and suitable for classification purposes under Regulation (EC) No 1272/2008. The test substance was found to be readily biodegradable under the test conditions. In all aquatic tests the test item showed no toxic effect on the tested species. The determined (L)EC50 and EC10 for fish, Daphnia magna and green algae were >100 mg/L (nominal). The 21 d NOEC to Daphnia magna was determined to be 44.7 µg/L (TWA measured concentration). The 35 d NOEC in the FLES study was determined to be >= 403 µg/L for all measured parameters. Based on these results, the substance is not classified for short-term (acute) aquatic toxicity nor classified for long-term (chronic) aquatic toxicity according to Regulation (EC) No 1272/2008 (CLP), as amended for the eighteenth time in Regulation (EU) 2022/692.