Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Key study: OECD Guideline 209. GLP study. The test substance was determined to be not toxic to waste water (activated sludge) bacteria below a loading rate of 3.2 mg/L.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 1 000 mg/L
- EC10 or NOEC for microorganisms:
- 3.1 mg/L
Additional information
Key study: Experimental result on test item Condesation products of cyclopentanone and pentaldehyde, fractionation pitch:
The influence of the test substance on the respiration rate of activated sludge was investigated after a contact time of 3 hours according to the OECD 209 Guideline (GLP study). The test substance was determined to be not clearly loading rate related. All loading rates ranging from 3.2 to 1000 mg/L showed a statistical significant, not clearly loading rate increasing effect. The NOEC was below the lowest loading rate tested (3.2 mg/L). The EC50was above the highest loading rate of 1000 mg/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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