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Ecotoxicological information

Toxicity to other above-ground organisms

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Description of key information

With high probability, not harmful to above-ground organisms

Key value for chemical safety assessment

Additional information

Information is available on the toxicity of ammonium sulphate to the amphibians Pseudacris regilla (Pacific treefrog), Ambystoma gracile (Northwestern salamander), and Rana aurora (Redlegged frog) (Nebeker and Schuytema, 2000). All tests were carried out for 10 days, in aquaria with a continuous flow of test solution.

Two experiments were carried out with Pseudacris regilla tadpoles from different egg masses, aged 6 and 9 weeks at the start of the test. Endpoints were growth and wet weight. The NOEC for the 6 week old tadpoles was 82 mg/L ammonium sulphate. The corresponding LOEC was 154 mg/L ammonium sulphate. The NOEC for the 9 week old tadpoles was 153 mg/L ammonium sulphate. The corresponding LOEC was 247 mg/L ammonium sulphate. The LC50 (10 d) for both 6 and 9 weeks old Pseudacris regilla tadpoles was > 995 mg/L.  Larvae of the Northwestern salamander (Ambystoma gracile) were 5 weeks old at the beginning of the test. The NOEC for the endpoint wet weight was 384 mg/L ammonium sulphate. The corresponding LOEC was 596 mg/L ammonium sulphate. The LC50 (10 d) for Ambystoma gracile was > 995 mg/L.  Tadpoles of the Redlegged frog (Rana aurora) were 4 weeks old at the beginning of the test. The NOEC for both endpoints of growth and wet weight was 390 mg/L ammonium sulphate. The corresponding LOEC was 631 mg/L ammonium sulphate. The LC50 (10 d) for Rana aurora was > 995 mg/L.

All these results indicate that ammonium sulphate is of little harm to above ground organisms, with NOEC and LOEC values substantially higher than 1 mg/L. There are no studies available for sodium sulphate or potassium sulfate; however, based on the lack of toxicity found in studies with aquatic organisms and the fact that both sodium and potassium are essential elements for living organisms, they are not expected to be harmful to above-ground terrestrial fauna.