Reaction mass of Cobalt, 4-[4-[[4-[[[3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1Hpyrazol-4-yl)azo]-4-hydroxyphenyl]sulfonyl]amino]phenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonate 4-[4-[[4-[[[3-[[4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl]azo]-4-hydroxyphenyl]sulfonyl]amino]phenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1Hpyrazol-1-yl]benzenesulfonate sodium complexes and Cobaltate(3-), bis[4-[4-[[4-[[[3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxyphenyl]sulfonyl]amino]phenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1Hpyrazol-1-yl]benzenesulfonato(3-)]-, trisodium and Cobaltate(5-), bis[4-[4-[[4-[[[3-[[4,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-1H-pyrazol-4-yl]azo]-4-hydroxyphenyl]sulfonyl]amino]phenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1Hpyrazol-1-yl]benzenesulfonato(4-)]-, pentasodium

Biodegradation in water: screening tests

Description of key information

Not readily biodegradable

Key value for chemical safety assessment

Biodegradation in water:

under test conditions no biodegradation observed

Type of water:

freshwater

Additional information

The test item was evaluated for ready biodegradability in water according to the OECD 301B and the EU-Method C.4-C. The degradation was followed by determining the carbon dioxide produced within a 28-day period.

The test concentration was 20 mg organic carbon per litre (corresponding to 59 mg test item/l). Aniline was used as a positive control. Activated sludge was used as inoculum (concentration in the test 25.0 mg dry matter/l). As with the test item, there are different constituents, the 10-day-window is not taken into account. Degradation of the test item was found to be 7 % in 28 days and all validity criteria were met.