Registration Dossier

Diss Factsheets

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
1 g/L
Assessment factor:
10

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
3.85 mg/kg sediment dw
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.385 mg/kg sediment dw
Assessment factor:
1 000
Extrapolation method:
assessment factor

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no exposure of soil expected

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
66.7 mg/kg food
Assessment factor:
300

Additional information

The decision not to derive freshwater and marine PNEC is based on the available acute and chronic toxicity results, which show that di-tert-dodecyl polysulfide is not toxic or harmful at the limit of water solubility.

Polysulfides, di-tert-dodecyl has been shown in the OECD 308 study to partition rapidly to the sediment compartment which is confirmed to be the sink of the substance in case of release to waste water. Therefore, further testing has been proposed to investigate toxicity to sediment organisms.

For derivation of freshwater and marine sediment PNECs a study according to OECD TG 218 has been carried out and the results reported in the relevant section. From the NOEC and an AF of 100 the PNEC for freshwater sediments has been calculated (an AF of 1000 has similarly been applied for marine sediment).

PNECsoil has not been derived in liaison with the unlikeliness of soil exposure.

The STP and oral PNECs have been derived on the basis of available data.

A quantitative risk assessment to aquatic compartment is not required for polysulphide, di-tert-dodecyl as the available toxicity data indicate that the substance is not toxic or harmful to the aquatic environment at the limit of water solubility.

Conclusion on classification

A complete acute and chronic aquatic toxicity package is available for characterizing polysulfides, di-tert-dodecyl hazard profile. Based on this dataset one can conclude that polysulfides, di-tert-dodecyl is not toxic or harmful up to its water solubility limit and therefore no classification related to its toxicity applies.