Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Biodegradation in water:

The substance is considered to be "Not Inherently Biodegradable". As only 30% of the substance are degraded in the inherent test study design a "ready biodegradability" of the substance can be excluded.

Additional information

Biodegradation in water:

Within 28 days a degradation rate of 30 % was determined in a study for the inherent biodegradability of the substance. The substance is considered to be "Not Inherently Biodegradable". As only 30% of the substance are degraded in the inherent test study design a "ready biodegradability" of the substance can be excluded.

Biodegradation in water and sediment: simulation tests

Applying the EAWAG-BBD Pathway Prediction System (PPS) to the molecule “dihydro-5,7,12,14-tetraazapentacene, diphenylated, monosulfonated” yields valuable information about the putative environmental fate of the substance. From the vast amount of possible biotransformation processes not a single one could be found, which can be considered as very likely to occur. However, this pathway only affects the phenylic moiety of the molecule, while the rest of the molecule does not undergo any further structural changes. Thus, the model does not predict a significant potential for biodegradation. Instead, only minor changes of the molecular structure, limited to the phenylic moiety, can be expected.  The arising transformation products are therefore structurally very similar to the initial educt.

It has to be noted that the investigated molecule acts only as a representative candidate for the registered substance. Taking this into account the obtained model data strongly point at a low potential for biodegradation for the representative molecule “dihydro-5,7,12,14-tetraazapentacene, diphenylated, monosulfonated” and as a consequence also for the registered substance “Hydrochloric acid, reaction products with aniline and nitrobenzene, sulfonated, sodium salts” CAS no.: 90411-76-0”.