Registration Dossier
Registration Dossier
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EC number: 204-514-8 | CAS number: 122-00-9
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The substance is readily biodegradable at a test concentration of 2.7 mg/L, which is a concentration reasonably to be expected at the influent of wastewater treatment plants. Further evidence is provided by the results of a modified MITI ready biodegradability study conducted at 100 mg/L test item concentration.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 100 mg/L
Additional information
The substance was readily biodegradable and not inhibitory to microbial activity at concentrations that can be expected in the influent of sewage treatment plants. This was demonstrated in the key study on ready biodegradability at test concentrations of 2.7 mg/L. Ready biodegradability was also found in the supporting study applying significantly higher test concentrations of 100 mg/L. The finding of non-inhibitory effects on microbial activity is supported by available studies on microbial inhibition test Staphylococcus aureus, Escherichia coli and other bacterial strains (Morris et al. 1979, Rajabi et al. 2005). In conclusion, a NOEC for inhibitory effects on micro-organisms of 100 mg/L was used further in the hazard assessment and the PNEC STP was derived from this NOEC.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
