Registration Dossier
Registration Dossier
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EC number: 947-892-6 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The substance is judged to be not readily biodegradable and poorly eliminated from water.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
No study investigating the ready biodegradability of the substance itself is available. Therefore, additional data on a close structural analogue is presented in a read-across approach.
The biodegradability of CAS 147-14-8 was tested in a study following OECD guideline 301 F using domestic activated sludge as inoculum (BASF 1988). After 28 days of inoculation a degradation rate of less than 1 % was determined (see analogue justification document for further details about the read across approach).
This result is supported by an inherent biodegradability test with the target substance performed according to OECD TG 302B (Zahn-Wellens/EMPA Test) and GLP (BASF 1992). In this study, ca 150 mg/L test substance (based on dissolved organic carbon) was inoculated with sludge of a domestic sewage treatment plant for 28 days under aerobic conditions. At regular intervals throughout the incubation period the concentration of dissolved organic carbon was measured as indication of biodegradation. After the 28-day exposure period, 5.7% of the test substance was biodegraded. Overall, the substance was determined to be poorly eliminable from water. In addition, the chemical oxygen demand of the target substance was determined in a study performed according to EEC Directive 84/449 Part C.9 and in compliance with GLP criteria (BASF 1991). In the study, 20 mg of test material was incubated for 2 hours at a temperature of 148 ± 3°C. The chemical oxygen demand was calculated from the amount of the unreacted K2Cr2O7, determined by a titration with (NH4)Fe(SO4)2·6H2O. The chemical oxygen demand was determined to be 130 mg O2/g test material.
Based on these data it can be concluded that Reaction product of Chloro[29H,31H-phthalocyaninato(2-)-N29,N30,N31,N32] aluminium, sulphuric acid and caustic soda is neither readily nor inherently biodegradable.
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