Registration Dossier
Registration Dossier
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EC number: 605-104-5 | CAS number: 157577-99-6
Endpoint summary
Administrative data
Description of key information
Additional information
The primary source, if releases would occur of environmental pollution of Acid Black 234 is represented by industrial waste water and secondary by release during washing of dyed textile, thus the fate and pathways of Acid Black 234 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 on similar substance 1.
Phototransformation in air/water/soil has not been investigated.
Acid Black 234 is not readily biodegradable, but considered inherently primary biodegradable for read across to similar substance 1.
Direct and indirect exposure of sediment and soil to Acid Black 234 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 234 is not expected to be released to air and is not expected to partition to this compartment. An estimated vapour pressure of 10-39 Pa at 25 deg C indicates that Acid black 234 will not exist if not in dust particles in the atmosphere. In vapour-phase Acid black 234 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 234 is expected to have very high mobility based upon a measured Koc of 1.
If released into water, Acid black 234 is not expected to adsorb to suspended solids and sediment based upon the measured Koc on similar substance 1.
There are no empirical bioaccumulation data available for Acid black 234, nevertheless the log Pow:is measured and it is equal to -1.86. On the basis of this outcome, it is expected that Acid black 234 has a low potential for bioaccumulation and/or a low potential to cross biological membranes.
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