Registration Dossier
Registration Dossier
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EC number: 947-964-7 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
- Endpoint:
- activated sludge respiration inhibition testing
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Justification for type of information:
- According to REACH Annex XI Section 1 (“The study is scientifically not necessary; other information available”) no study on the toxicity to microorganisms has to be conducted. Following REACH Annex XI Section 1.2 “Weight of Evidence” other information is available that is reliable and sufficient to cover the endpoint of toxicity to microorganisms according to REACH Annex VIII Section 9.1.1 Column 1.
According to the ECHA Guidance document R7b, no further test on the toxicity to microorganisms has to be conducted if the toxicity control in a ready biodegradability test shows no inhibitory effects on microorganisms. As the toxicity control in the ready biodegradability test showed no inhibition of the microbial activity at the highest feasible substance concentration of 2 mg/L, no further test is necessary to evaluate the respiration inhibition of activated sludge. The concentration used in the toxicity control (2 mg/L) can be used as NOEC value.
Reference
Description of key information
In a ready biodegradability test no toxic effects to microorganisms were observed after incubation with the highest feasible concentration of 2 mg/L test substance.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 2 mg/L
Additional information
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.
