Registration Dossier
Registration Dossier
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Reaction mass ofDisodium [1-{[2-(hydroxy-kO)-3,5-dinitrophenyl]diazenyl-kN1}naphthalen-2-olato(2-)-kO][3-(hydroxy-kO)-4-{[2-(hydroxy-kO)naphthalen-1-yl]diazenyl-kN1}-7-nitronaphthalene-1-sulfonato(3-)]chromate(2-) andDisodium [1-{[2-(hydroxy-kO)-3,5-dinitrophenyl]diazenyl-kN2}naphthalen-2-olato(2-)-kO][3-(hydroxy-kO)-4-{[2-(hydroxy-kO)naphthalen-1-yl]diazenyl-kN1}-7-nitronaphthalene-1-sulfonato(3-)]chromate(2-)
EC number: 944-038-4 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
- Endpoint:
- activated sludge respiration inhibition testing
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Study completion date: 24 January 1980
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: Method B-10
- Version / remarks:
- Comparable with internationally acceptable guidelines
- Deviations:
- no
- GLP compliance:
- no
- Specific details on test material used for the study:
- Name: FAT 20037/B
Purity: 81.5 % - Analytical monitoring:
- no
- Vehicle:
- not specified
- Test organisms (species):
- activated sludge
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 21 d
- Reference substance (positive control):
- not specified
- Key result
- Duration:
- 21 d
- Dose descriptor:
- other: BST
- Effect conc.:
- > 300 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The toxicity to activated sludge for FAT 20037/B was found to be greater than 300 mg/L.
- Executive summary:
A study was performed with FAT 20037/B to determine the toxicity to microorganisms. This test was conducted according to CIBA internal guideline Method B-10. Based on the findings of the study, the toxicity to activated sludge for FAT 20037/B was found to be greater than 300 mg/L.
Reference
Description of key information
In a study conducted to evaluate the toxicity of the test substance to bacteria, the IC50 (BST) was determined to be greater than 300 mg/L. Similar outcome was reported from a supporting study, where the IC50 (BST) to activated sludge was again determined to be greater than 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.
