Registration Dossier
Registration Dossier
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EC number: 451-490-1 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The test substance is not readily biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The ready biodegradability of the test substance was determined in a GLP-compliant study according to OECD Guideline 301F (RCC, 2004). The test substance and the reference substance were tested at a nominal concentration of 102 mg/L DOC. Biodegradation of the test substance after 28 days was found to be 0%.
The inherent biodegradability of the test substance was determined in a GLP-compliant test according to OECD Guideline 302B (RCC, 2005). The test substance was tested at a concentration of 250 mg/L DOC. In this test DOC removal was determined at 25% which may be regarded as evidence of inherent, primary biodegradability.
The biological oxygen demand (BOD5) and chemical oxygen demand (COD) were examined as part of the readily biodegradability test. After 5 days the BOD5 was determined at 0 mg O2/mg test item. The chemical oxygen demand (COD) was determined at 1 mg O2/mg test item. The BOD5/COD ratio supports the conclusion that the test substance is not readily biodegradable.
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