Registration Dossier
Registration Dossier
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EC number: 421-140-2 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
RSS-4, dry substance is not readily degradable according to this Modified Sturm test, but because significant degradation occurred, it can be considered to be inherently degradable.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
Additional information
Only one study is available assessing the biodegradation of RSS-4, dry substance. This study (rated K1) is performed in 1996 according to internationally accepted methods and in compliance with the criteria of GLP.
In the Modified Sturm test, mean cumulative CO2 production by the mixtures containing RSS-4 at 10 mgC/L was equivalent to 10% of the theoretical value after 5 days of incubation and 60% after approximately 18 days; 76% degradation was achieved after 29 days. Following a lag period of approximately 3 days, degradation was progressive throughout; a degradation plateau was not attained in the test.
Substances are considered to be readily degradable in this test if CO2 production is equal to or greater than 60% of the theoretical value within 10 days of the level achieving 10%. RSS-4 cannot therefore be considered to be readily biodegradable but because significant degradation occurred, it can be considered to be inherently degradable.
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