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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Ecotoxicological Summary

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
2.67 µg/L
Assessment factor:
3
Extrapolation method:
sensitivity distribution
PNEC freshwater (intermittent releases):
5.5 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
1.7 µg/L
Assessment factor:
3
Extrapolation method:
sensitivity distribution

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
1 500 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (freshwater)

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

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
5.3 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:
0.2 mg/kg soil dw
Assessment factor:
3
Extrapolation method:
sensitivity distribution

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
PNEC oral
PNEC value:
1 mg/kg food
Assessment factor:
1

Additional information

Further details of the PNEC derivation are explained in the attached document.

Conclusion on classification

Reliable acute and chronic toxicity data are available for effect of inorganic selenium compounds on the three trophic levels.

The acute classification is based on the lowest value that was identified for any of the three trofic levels that are taken into account: 

  • The lowest relevant and reliable acute fish LC50for soluble inorganic selenium substances is 2060 µg Se/L;
  • The lowest relevant reliable acute invertebrate E(L)C50for soluble inorganic selenium substances is 550 µg Se/L;
  • The lowest relevant reliable algal E(L)C50for soluble inorganic selenium substances is 240 µg Se/L.Algae and invertebrates are markedly more senstive to dissolved Se than fish. The ERVacutefor selenium is based on algal data and is 240 µg Se/L.

Algae and invertebrates are markedly more senstive to dissolved Se than fish. The ERVacutefor selenium is based on algal data and is 240 µg Se/L

 

The chronic classification is based on the lowest value that was identified for any of the three trophic levels that are taken into account: 

  • The lowest relevant and reliable chronic fish NOEC for soluble inorganic selenium substances is 10 µg Se/L
  • The lowest relevant and reliable chronic invertebrate NOEC for soluble inorganic selenium substances is 70 µg Se/L
  • The lowest relevant and reliable algal NOEC for selenium soluble inorganic selenium substances is 197 µg Se/L

Fish were the most sensitive trofic level upon long-term exposure and determined the ERVchronicfor selenium of 10 µg Se/L.

Taking into account the solubility of Selenium metal there is no need to classify this substance for the environment. Selenium metal, however, has a harmonised classification for the environment (Aq.Chronic Cat.4), and this classification is currently applied.