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EC number: 232-088-3 | CAS number: 7785-84-4
Please see attached Tables Table 1 Effect of Sodiumtrimetaphosphate on the Mobility of Daphnia magna & Table 2 Dissolved Oxygen Concentrations, pH Values and Temperature in the Treatments.
A limit test was performed in accordance with the test guidelines to demonstrate that the test item Sodiumtrimetaphosphate has no toxic effect on the test organisms up to and including a nominal concentration of 100 mg/L. Thus, the only nominal concentration tested was 100 mg/L. Additionally, a control (test water without test item)was tested in parallel.
The analytically determined concentration of the test item in the test medium at the start and at the end of the test was 85 and 96% of the nominal value, respectively. Thus, the test item Sodiumtrimetaphosphate proved to be stable during the test period of 48 hours under the conditions of the test. Therefore, all reported results are related to the nominal concentration of the test item.
In the control and at the test item concentration of 100 mg/L, no immobilized test organisms were observed during the test period of 48 hours. Therefore, the 48-hour NOEC and 48-hour EC0of Sodiumtrimetaphosphate toDaphnia magnawere determined to be at least 100 mg/L. The 48-hour NOEC and 48-hour EC0might even be higher, but concentrations above 100 mg/L were not tested, in accordance with the test guidelines. The 48-hour EC50and the 48-hour EC100were clearly higher than 100 mg/L. These values could not be quantified due to the absence of a toxic effect of Sodiumtrimetaphosphate at the test concentration of 100 mg/L.
Thus, it can be concluded that the test item Sodiumtrimetaphosphate has no acute toxic effect on Daphnia magna up to a concentration of 100 mg/L under the present test conditions.
One key study exists. This study had been conducted in accordance with a recommended guideline (OECD 202, EU Method C.2) and under the conditions of GLP. As such, no further testing is considered necessary.
On the basis of a limit test, the EC50 of trisodium trimetaphosphate has been determined to be >100 mg/l.
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