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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

Toxicity of sodium 3(2H-benzotriazol-2-yl)-5-sec-butyl-4-hydroxybenzenesulfonate on microrganisms was investigated by determing the effects on respiration rate for a period of 30 minutes in an activated sludge respiration inhibition test according to OECD guideline 209. The IC50 (3 h) of test item was > 100 mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L

Additional information

Toxicity of sodium 3(2H-benzotriazol-2-yl)-5-sec-butyl-4-hydroxybenzenesulfonate on microrganisms was investigated by determing the effects on respiration rate for a period of 30 minutes in an activated sludge respiration inhibition test according to OECD guideline 209. The IC50 (3 h) of test item was > 100 mg/L. Effects noted for the concurrent positive control (3,5 -Dichlorphenol) confirmed the validity and sensitivity of the test.