Registration Dossier
Registration Dossier
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EC number: 421-880-6 | CAS number: 201792-73-6
Endpoint summary
Administrative data
Description of key information
Additional information
The primary source, if releases would occur of environmental pollution of Acid Black 210 is represented by industrial waste water and secondary by release during washing of dyed textile, thus the fate and pathways of Acid Black 210 in surface water is of primary concern.
In the aquatic environment, hydrolysis is not expected to be an important removal process as shown by the experimental test available.
Phototransformation in air/water/soil has not been investigated.
Under standard test conditions no readily biodegradation was observed; Acid Black 210 was tested following the Zahn-Wellens/EMPA procedures with a final result of 38% of biodegrdation after 28 days. The substance is then considered not readily biodegradable, but can be considered inherently primary biodegradable and is expected to be persistent.
Direct and indirect exposure of sediment and soil to Acid Black 210 is unlikely; since no exposure of the aquatic compartment is foreseen and thus subsequent sediment and/or soil exposure can be excluded.
Given the intended use in aqueous-based treatments, Acid Black 210 is not expected to be released to air and is not expected to partition to this compartment. An estimated vapour pressure of 10-45 Pa at 25 deg C indicates that Acid black 210 will not exist if not in dust particles in the atmosphere. In vapour-phase Acid black 210 will be degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals; the half-life for this reaction in air is estimated to be 0.6 hours; degradation in sunlight also occurs.
If released to soil, Acid black 210 is expected to have very high mobility based upon a measured Koc of 1. Volatilization from moist soil surfaces is not expected to be an important fate process based upon an estimated Henry's Law constant of 9*10-9 Pa m3/mol.
If released into water, Acid black 210 is not expected to adsorb to suspended solids and sediment based upon the measured Koc.
There are no empirical bioaccumulation data available for Acid black 210, nevertheless the log Pow:is measured and it is equal to -1.73. On the basis of this outcome, it is expected that Acid black 210 has a low potential for bioaccumulation and/or a low potential to cross biological membranes.
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