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Toxicity to microorganisms

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Description of key information

Toxicity to microorganisms - OECD 209 – EC20: 292 mg/l,EC50: >1000 mg/l, 3h - PARAD consortium, NOACK, 2010, S. Fiebig)

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L

Additional information

Toxicity to microorganisms - OECD 209 – EC20: 292 mg/l,EC50: >1000 mg/l, 3h - PARAD consortium, NOACK, 2010, S. Fiebig)

A Respiration Inhibition Test according to OECD Guideline No. 209 was performed with the test item Photomer 4149 F (batch-no. S700040031) from 2010-04-26 to 2010-04-27 atDr.U.Noack-Laboratorien, D-31157Sarstedt.Test system was activated sludge of the municipal treatment plant of D-31157 Sarstedt. The test was performed under static conditions with the nominal concentrations 100 - 180 - 320 - 580 - 1000 mg/L. The respiration rates of control, reference and test item concentrations were measured after a contact time of three hours, and the inhibitory effects of the test and reference item were determined in comparison to the control respiration rates. The inhibition ranged from 6 % to 46 %. The EC20value is given in Table 1, due to the low inhibitions the EC50- and EC80-values of the test item could not be calculated (Table 1). The EC20 was determined to be EC20: 292 mg/l whereas the EC50 was determined to be EC50: >1000 mg/l.

 

Evaluation: valid without restrictions, Klimisch-I , Key study