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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

Most sensitive species: Daphnia magna
48h-EC50 = 11 mg PBS/L; 3.4 mg H2O2/L; 1.2 mg B/L

Key value for chemical safety assessment

Additional information

Only the test resulting in the lowest EC50 and NOEC values of 11 and 8 mg PBS/L (3.4 and 2.5 mg H2O2/L; 1.2 and 0.86 mg B/L) for the toxicity of sodium perborate monohydrate on water fleas (Daphnia magna), respectively, could be considered valid without restrictions (Solvay Duphar, 1993). For initial nominal sodium perborate concentrations of 2 - 32 mg/L loss of active oxygen concentrations measured daily during exposure was < 11 %. Two other guideline studies with Daphnia magna and sodium perborate tetrahydrate are considered less reliable because of insufficient documentation (Henkel, 1991) or because effect data were based on nominal concentrations (Thybaud and Lamy, 1996). Nevertheless results from both studies (EC50: 6.4 and 5.3 mg H2O2/L; 2.1 and 1.05 mg B/L, respectively) support the effect data reported in Solvay Duphar (1993).

No information on the effects of sodium perborate on marine invertebrates could be identified.

Further information from tests with degradation products

Results from two short-term tests on the toxicity of hydrogen peroxide on Daphnia magna and Daphnia pulex have been reviewed in the EU Risk Assessment Report on Hydrogen Peroxide (ECB 2003), revealing EC50 values of 2.3 and 2.4 mg/L, respectively.

The most sensitive effect value on the acute toxicity of boric acid on invertebrates reviewed by ECB (2009, Assessment Report Boric acid. Product-type 8 (Wood preservative). 20 February 2009) was Daphnia magna with a 48h-EC50 of 141 mg B/L. This value is considerably higher that the LC50 value (in boron equivalents) determined for sodium perborate monohydrate on the same species (see above), demonstrating that the effects of sodium perborate are mainly caused by hydrogen peroxide..