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EC number: 617-081-9
CAS number: 80473-92-3
Two acute aquatic toxicity tests on aquatic invertebrates (daphnia
magna) and aquatic algae ( Pseudokirchneriella subcapitata)
were negative with regards to acute aquatic toxicity for thioacid.
No concentration related immobility of Daphnia magna was observed in the
control and all exposure concentrations during the range-finding limit
test. As there was no immobility observed during the range-finding limit
test, the 48-hour EC50 value and the corresponding no observed effect
concentration (NOEC) for Daphnia magna exposed to Thio-Acid could not be
determined. Therefore, the 48-hour EC50 value is considered to be
>100mg/L, the highest nominal exposure concentration tested in the
range-finding limit test.
The effect of the test item on the growth of Pseudokirchneriella
subcapitata has been investigated over a 72-Hour period and based on the
geometric mean measured test concentrations gave the following results:
Growth rate: EC50 : 53 mg/l, NOEC : 18 mg/l, LOEC : 58 mg/l
Yield: EC50 : 35 mg/l, NOEC : 18 mg/l, LOEC : 58 mg/l
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