Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.1 mg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
1 mg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.01 mg/L
Assessment factor:
10 000
Extrapolation method:
assessment factor

STP

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

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
0.368 mg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
36.8 µg/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:
14.9 µg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Calculation of PNEC water was based on results obtained in short-term studies on fish, daphnia and algae, namely L(E)C50 > 100 mg/l as loading rate. These results indicate the lack of acute toxicity for the three trophic levels up to concentration of 100 mg/l (loading rate).

Conclusion on classification

According to the CLP Regulation (EC n.1272/2008), the threshold of classification of a substance for acute aquatic toxicity is 1 mg/l. This limit is compared with LC50 (96h) for fish, EC50 (48 h) for daphnia and EC50 (72 - 96 h) for algae or aquatic plants.

An experimental value of LC50 96h fish > 100 mg/l loading rate was obtained for Tetraphosphorus trisulphide.

A study to assess the short-term toxicity to Daphnia Magna was performed and the result of the test was EC50 48h Daphnia Magna > 100 mg/l loading rate.

Toxicity on algae was assessed in 72 -hour test always on this substance. EC50 for algal growth rate was identified as major than 100 mg/l loading rate.

No chronic toxicity data is available from long-term studies. In case of lack of chronic data, the potential for chronic toxicity is identified by appropriate combinations of acute toxicity data and lack of biodegradability. The threshold of classification is 100 mg/l.

Even though no acute short term toxicity was observed in the experimental studies performed on Tetraphosphorus trisulphide for none of the three trophic levels, the substance is classified H400 (Aquatic Acute toxicity cat.1) according to annex VI of the CLP Regulation (EC n.1272/2008).