Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

The primary source, if releases would occur of environmental pollution of the Direct Blue 199 is represented by industrial waste water, thus the fate and pathways of substance in surface water is of primary concern.

 

In the aquatic environment, hydrolysis is not expected to be an important removal process for substance.

Phototransformation in air/water/soil has not been investigated.

 

The binding capacity (or “stickiness”) of the substance to solid surfaces is expected to be low.

Given the intended use in aqueous-based treatments, Direct Blue 199 is not expected to be released to air and is not expected to partition into this compartment.

 

Under standard test conditions no readily biodegradation was observed; Direct Blue 199_Na was tested following the Zahn-Wellens/EMPA procedures and less than 20 % degradation (i.e. 5 %) was attained after 28 days of contact time. The usage of information on Direct Blue 199_Na, which has the same main component and with a different counter ion, can be considered as suitable and appropriated because the difference in salification is expected to not influence the characteristics related to the specific end-point. The impurity profile does not impact on the read across proposed. Details on the approach followed are included in the document attached to the IUCLID section 13. Therefore, Direct Blue 199 is expected to be persistent.

 

There are no empirical bioaccumulation data available for Direct Blue 199, nevertheless on the basis of the negative log Pow, it is expected that Direct Blue 199 has a low potential for bioaccumulation and/or a low potential to cross biological membranes.

Additional information


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