Registration Dossier
Registration Dossier
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EC number: 411-930-5 | CAS number: 106917-31-1 SANDUVOR 3058; SANDUVOR 3058 LIQ.
Endpoint summary
Administrative data
Description of key information
Relevant key information is given in the endpoint summaries on the respective properties.
For a summary on relevant environmental fate properties, please see below!
Additional information
The submission substance was reliably tested for its biotic and abiotic degradation, i.e. ready biodegradability (RL2) and hydrolysis as a function of pH (RL2). Results showed that the submission substance did not readily biodegrade (ca. 20% mineralization observed) and was only weakly degraded through hydrolysis at pH 7, however significantly hydrolysed at pH 4 and pH 9. The substance is of very poor solubility in water (<50 µg/L), and reliable results on adsorption-desorption (RL1; log Koc 4.97 according to valid, reliable and relevant QSAR results) demonstrate a high potential for adsorption on the organic carbon fraction of solids. As such, strong binding to the particulate fraction of sewage sludge is expected, as well as partitioning to suspended matter in surface water. According to McCall et al. (1981) with regard to mobility of chemicals in soil, substances are characterized as slightly mobile with Koc between 2000 and 5000 (log KOC between 3.3 and 3.7) and immobile with Koc above 5000 (log KOC ≥ 3.7). As such, the submission substance must be regarded as immobile in soil and thus there will be no leaching of the compound into ground water.
A relevant bioaccumulation potential could be safely ruled out by a valid and reliable QSAR study (RL1) comprising QMRF and QPRF for the key model, as well as two valid supporting models differing in methodology and corroborating results of the key model. The results of the key model (BCF 26 to 447 L/kg wet weight; US EPA T.E.S.T. v. 4.2.1 BCF Consensus Method) and the supporting models (BCF= 294 L/kg wet weight according to supporting model 1: Arnot and Gobas (2003) Bioconcentration Model; BCF= 386 L/kg wet weight according to supporting model 2: Modified Connell Equation) conclusively demonstrate that the submission substance is not bioaccumulative (BCF clearly below 2000 L/kg); and that the upper limit of the estimated BCF (447 L/kg) based on T.E.S.T. Consensus Method results (key model) will be sufficiently conservative to be used as the relevant figure for chemical risk assessment.
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