Registration Dossier
Registration Dossier
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EC number: 700-327-5 | CAS number: 1061328-86-6
Bioaccumulation: aquatic / sediment
Administrative data
Link to relevant study record(s)
Description of key information
No experimental investigation triggered in accordance to REACH, Annex IX, Section 9.3.2, column 2.
Calculation with BCFBAF v3.01 (EPIWIN software by US-EPA): 3.16 L/kg wet-wt, bioaccumulation is not expected.
Key value for chemical safety assessment
- BCF (aquatic species):
- 3.16 L/kg ww
Additional information
The bioconcentration factor (BCF) of the test substance was determined by the computer program BCFBAF v3.01 (EPIWIN software) by US-EPA (Chemservice S.A., 2012).Furthermore, the whole body primary biotransformation rate estimation for fish was calculated by the same program with the notation that the bio half-life is normalized to 10 g fish at 15 °C. With this result it is possible to predict the apparent metabolism half-life in fish for three different trophic levels (lower, mid and upper).In general, the bioconcentration factor of a substance describes the accumulation potential of a substance dissolved in water by an aquatic organism. BCFBAF v3.01 calculates also the BAF (Bioaccumulation factor) of the chemical, which is defined as the steady-state (equilibrium) ratio of the substance concentration in an organism to the concentration in the surrounding medium. However, this value is not taken into account for the risk assessment and is not relevant for a registration under REACH Regulation (EC) 1907/2006. Using the regression-based estimate (traditional method) of the computer program BCFBAF from US-EPA a Bioconcentration Factor (BCF) of 3.16 L/kg wet-wt was calculated for the test substance. Using the Arnot-Gobas method, which is based on mechanistic first principles, an aquatic BCF of 0.90 L/kg wet-wt is the result.
The whole body primary biotransformation rate estimate for fish results in a half-life of 1.314E-5 days (0.00001 days), whereby the bio half-life is normalized to 10 g fish at 15 °C. The rate constant (kM) for 10 g fish is 125/day. This is taken into account to predict the apparent metabolism half-life in fish of the test substance. With the Arnot-Gobas method it is possible to differentiate between three trophic levels. For the lower trophic level the BCF results in 0.94 L/kg wet-wt, for a mid trophic level the result is 0.93 L/kg wet-wt and for the higher trophic level 0.89 L/kg wet-wt.The metal component (Na) has been removed to perform the predictions and the experimentally determined logPow of -1.96 (Guzik, 2011) is taken into account.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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