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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Elimination = 62.45 %

Key value for chemical safety assessment

Biodegradation in water:
inherently biodegradable

Additional information

The inherent biodegradation of Acid Yellow 151 is 62.45 %. Based on the ECHA Guidance 7B , the biodegradation above 20 % of theoretical (measured as BOD, DOC removal or COD) may be regarded as evidence of inherent, primary biodegradability, whereas biodegradation above 70 % of theoretical (measured as BOD, DOC removal or COD) may be regarded as evidence of inherent, ultimate biodegradability. The result is between 20 % and 70 %, therefore there is evidence of inherent primary biodegradation. Another informations on the 5-day biochemical oxygen demand (BOD5) can be used for classification purposes only when no other measured degradability data are available. The BOD5 values within the old studies shows a low value or zero. In the recent study (1), well cunducted and comliant to the european guidelines , the value of BOD5 is also zero. The low value of BOD5 gives another indication of not ready biodegradability.

1)Report on the DETERMINATION of the BOD5 (Biological Oxygen Demand) of FAT-20'136/F