Registration Dossier
Registration Dossier
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EC number: 291-103-1 | CAS number: 90341-71-2
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Not readily or inherently biodegradable, but > 70% primary biodegradation observed.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The ready biodegradability of Remazol Brillantblau Gran 133 was tested on anaerobic bacterial by ISO 11734 method. Methane and carbon dioxide release was determined quantitatively. From the amount of carbon released into the gas is formed in a ratio of carbon used to determine the contents of the rate of anaerobic biodegradation.This test is used for the examination completely anaerobic.
A significant anaerobic biodegradation was not observed. The formation of gas within 56 days remained below 10% of the theoretical maximum.
The inherent biogedradability of Remazol Brillantblau BB Neu FWTR was examined according to method OECD 302B. A significant biologic degradation was not noted. The DOC-removal in 28 days was < 20%.
An additional test for primary degradation via light-absorption of filtrated samples showed an almost complete decoloration of the test medium. Therefore, a good primary biologic degradation is shown; more than 70% of the dye has been metabolised, however, less than 20% has been completely degraded to CO2.
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