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EC number: 200-843-6 | CAS number: 75-15-0
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Two studies were available on the toxicity of CS2 for soil micro-organisms. In the key study, CS2 the 5-d EC50 in a clay loam soil was found to be 0.21 mg/kg and the 14-d EC50 was 2.1 mg/kg. In the suporting study, nitrification was completely inhibited at low concentration (10 mg/kg). No quantitative information can be obtained from the study.
Key value for chemical safety assessment
- Short-term EC50 for soil microorganisms:
- 0.21 mg/kg soil dw
Additional information
Two studies were available on the toxicity of CS2 for soil micro-organisms.
In one study CS2 was incubated with several soil types in closed flasks and the effect on the rate of nitrification (formation of nitrate from ammonium) was measured. CS2 appeared to inhibit nitrification. CS2appeared to be a strong inhibitor of nitrification. The 5-d EC50 in a clay loam soil was found to be 0.21 mg/kg and the 14-d EC50 was 2.1 mg/kg.
In the suporting study, soil was fumigated with CS2. After inoculation with fresh soil the oxygen consumption, the evolution of CS2 and N-mineralisation were strongly enhanced, probably due to the killing of micro-organisms. Nitrification was completely inhibited at low concentration (10 mg/kg). No quantitative information can be obtained from the study.
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