Registration Dossier
Registration Dossier
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EC number: 603-094-7 | CAS number: 125904-11-2
Endpoint summary
Administrative data
Description of key information
Additional information
In studying the adsorption/desorption coefficient, DBS eluted as three chromatographically resolved peaks. The first peak, representing the monobromostyrene minor constituent, had a mean peak retention time of 5.435 minutes. The second peak, representing the dibromostyrene major constituent, had a mean peak retention time of 7.067 minutes. The third peak, representing the tribromostyrene minor constituent, had a mean peak retention time of 9.275 minutes. The retention times for all three DBS peaks were bracketed by the reference standards. The corresponding mean log KOC values for DBS were calculated as 3.27 ± 0.000274, 3.79 ± 0.000551 and 4.26 ± 0.000762, respectively, for the three constituents. The solubility of DBS in HPLC-grade bottled reagent water was dependent on the component of the DBS test substance being monitored. The mean water solubility for DBS at 20 ºC was 6.91 ± 0.0871, 49.2 ± 1.45, and 1.03 ± 0.104 mg/L using the dibromo-, monobromo-, and tribromostyrene surrogates for the test substance, respectively, to quantitative DBS concentrations. The available data indicates that the substance is likely to partition to particulates, however as the substance is only manufactured or imported to the EU as a polymer, exposure to the environment of the monomer is unlikely. In view of this exposure information further transport and distribution testing on the monomer is considered to be inappropriate.
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