Registration Dossier
Registration Dossier
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EC number: 280-068-8 | CAS number: 82933-90-2
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
- Endpoint:
- toxicity to microorganisms
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 1981
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- according to guideline
- Guideline:
- other: Method B10
- Deviations:
- not specified
- Principles of method if other than guideline:
- An internal SOP was used comparable to current OECD guidelines.
- GLP compliance:
- no
- Analytical monitoring:
- no
- Vehicle:
- not specified
- Test organisms (species):
- activated sludge
- Test type:
- not specified
- Water media type:
- not specified
- Limit test:
- no
- Remarks on exposure duration:
- No data
- Post exposure observation period:
- Not available
- Hardness:
- Not available
- Test temperature:
- Not available
- pH:
- Not available
- Dissolved oxygen:
- Not available
- Salinity:
- Not available
- Nominal and measured concentrations:
- Not available
- Details on test conditions:
- Not available
- Reference substance (positive control):
- no
- Duration:
- 24 h
- Dose descriptor:
- IC50
- Effect conc.:
- > 300 mg/L
- Nominal / measured:
- not specified
- Conc. based on:
- not specified
- Basis for effect:
- not specified
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The toxicity to activated sludge of FAT 20043/A was found to be greater than 300 mg/l.
- Executive summary:
The toxicity to activated sludge of FAT 20043/A was found to be greater than 300 mg/l.
Reference
Description of key information
The toxicity to microorganisms of the test substance was determined prior to the publication of OECD guidelines in 1981. The study report for two tests is merely a presentation of results and little information about the test methods is available. The method is described as "KST" orKlärschlammtoxizitätwhich is a German synonym for "Toxicity to Activated Sewage Bacteria". This method is designed to evaluate the acute bacterotoxicity to sewage sludge or isolated suspended bacteria under aerobic conditions. The report indicates "Nutrient broth" as the media used. The resulting effect concentration is reported as >300 mg/l
Key value for chemical safety assessment
- EC50 for microorganisms:
- 300 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.
