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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The inhibition of the degradation activity of activated sludge is not anticipated when tris(2,4-di-tert-butylphenyl)phosphite introduced in appropriate low concentrations.

Key value for chemical safety assessment

Additional information

The toxicity of tris(2,4-di-tert-butylphenyl)phosphite on microorganisms was tested in a limit test performed according to OECD guideline 209 [Ciba, 1988]. At the test concentration of about 100 mg/L no effect on the respiration rate of activated domestic sludge was measured.