Registration Dossier
Registration Dossier
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EC number: 220-491-7 | CAS number: 2783-94-0
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
Based on the Level III Fugacity Model, the half life period of the disodium 6-hydroxy-5-[(4-sulphonatophenyl) azo] naphthalene-2-sulphonate was estimated. The half of disodium 6-hydroxy-5-[(4-sulphonatophenyl)azo]naphthalene-2-sulphonate in water is 38 days (912 hrs) based on which it is considered that the substance will qualify as not persistent.
The half life of the substance in sediment is estimated as 340 days (8160 hrs). Based on this value, it can be inferred that the substance is persistent in sediment medium.
Key value for chemical safety assessment
- Half-life in freshwater:
- 38 d
- at the temperature of:
- 25 °C
- Half-life in freshwater sediment:
- 340 d
- at the temperature of:
- 25 °C
Additional information
Based on the Level III Fugacity Model (PBT Profiler), the half life period of the disodium 6-hydroxy-5-[(4-sulphonatophenyl) azo] naphthalene-2-sulphonate was estimated. The half of disodium 6-hydroxy-5-[(4-sulphonatophenyl)azo]naphthalene-2-sulphonate in water is 38 days (912 hrs) based on which it is considered that the substance will qualify as not persistent.
The half life of the substance in sediment is estimated as 340 days (8160 hrs). Based on this value, it can be inferred that the substance is persistent in sediment medium.
PBT profiler estimation:
Medium |
Half life in Days |
Percent in medium |
Water |
38 |
9% |
Sediment |
340 |
13% |
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