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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

No inhibition of respiration of activated sludge was observed up to 100 mg/L the highest tested concentration in an OECD 209 compliant study.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
100 mg/L

Additional information

The purpose of this study was to determine the effect of the test item on bacteria according to the OECD guideline 209 "Activated Sludge, Respiration Inhibition Test" and the OECD principles of Good Laboratory Practices.

The effect of the test item on bacteria is assessed by measuring the micro-organisms respiration rate on a sample of activated sludge during an incubation period of 3 hours.

 

The EC50calculations of respiration inhibition rate of reference and test substances are presented hereafter:

Test item: EC50- 3h > 100 mg/L

3,5-Dichlorophenol = 9.43 mg/L