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Short-term toxicity to fish

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Description of key information

Short-term toxicity to fish

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
0.6 mg/L

Additional information

Studies are presented for a variety of species as follows:

 

Rainbow trout: LC50 (96- h): 0.6 mg/L test mat. (nominal) (K2)

 

Fathead minnow:LC50 (96- h): 44.8 mg/L test mat. (nominal) (K2)

 

Salmo gairdneri (new name: Oncorhynchus mykiss):LC50 (96- h): 0.6 mg/L test mat. (nominal) & 0.75 mg/L test mat. (nominal) (K2)

 

Pimephales promelas:LC50 (96- h): > 100 mg/L test mat. (nominal) (K2)

 

Lepomis macrochirus:LC50 (96- h): 7000 ppm test mat. (nominal) (K4)

 

Menidia beryllina:LC50 (96- h): 8700 ppm test mat. (nominal) (K4)

 

The results demonstrate that toxicity is prevalent in certain species, but not others. However, this may be due to differences in the methodology and testing procedures utilised.

As it is known that the phosphates as a group demonstrate toxicity to aquatic organisms, the LC50 value for hazard assessment is taken as 0.6 mg/l.. The risk phrase "Very toxic to aquatic organisms" is applicable.