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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Description of key information

A 14-d LC50 of 100 -320 mg/kg soil ww was found and the 28-d NOEC for reproduction was ≤18 mg/kg soil ww 

Key value for chemical safety assessment

Short-term EC50 or LC50 for soil macroorganisms:
100 mg/kg soil dw
Long-term EC10, LC10 or NOEC for soil macroorganisms:
18 mg/kg soil dw

Additional information

Vonk et al. (1986) investigated the acute toxicity of tetrachloroethylene to the earthworm (Eisenia foetida) using OECD guideline No. 207. They used an artificial soil (10% peat, 20% Kaolin clay and 70% industrial sand) with a pH of 6. The exposure period was extended from 14 days (as recommend in the guidelines) to 28 days. Production of cocoons was observed in addition to mortality. To overcome the problem of evaporation, tetrachloroethylene was tested in closed containers supplied with sufficient oxygen for the worms to breathe and the soil and substrate were replaced weekly. The 14-day LC50 was 100-320 mg/kg, the 28-day NOEC (based upon cocoons) was ≤18 mg/kg and the 28-day NOEC (based upon appearance) was 18-32 mg/kg. Römbke et al. (1991) investigated the acute toxicity of tetrachloroethylene to the earthworm (Eisenia foetida) using OECD guideline No. 207. The concentrations reported are nominal concentrations, and no precautions were taken to prevent evaporation of tetrachloroethylene from the soil. Therefore, these results may underestimate the toxicity.