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EC number: 425-220-8
CAS number: 5945-33-5
A test for ready biodegradability conducted according to the Modified
MITI (OECD Test Guideline 301C) indicated that the chemical only very
slowly degraded under the conditions of the test (Iwami S, 1994). The
result of this test indicates that the BDP is not readily biodegradable.
The eventual fate of the majority of the imported chemical will be
strongly linked to that of discarded plastic articles, and this is
likely to be either placed into landfill or be incinerated. The chemical
to be disposed of to landfill will be incorporated and immobilised in a
solid resin matrix (ie the plastic article). However, the resin matrix
will be slowly degraded through the biological and abiotic processes
operative in landfills, to release the BDP. The compound has a large Koc
(log Koc > 4.53), indicating strong affinity for the organic component
of soils and sediments, and low mobility in these media. The chemical is
not readily biodegradable, but when bound to, or otherwise associated
with soils and sediments, it could be expected to be slowly degraded
through the agency of biological and abiotic processes operative within
landfills.The high log Pow (> 6), relatively low molecular weight (693
g/mol) and low water solubility (0.4 mg/L) indicate large potential for
bioaccumulation (Connell, 1990).
Hydrolytic degradation of the compound was studied as a function of pH
by incubating stoppered flasks containing (nominally) 0.25 mg/L in
buffer solutions at pH 4, 7 and 9 for 5 days. The concentration of the
compound in the solutions was determined using HPLC at various times
over the 5 day (120 hour) test period. Very little degradation was
observed in any of the buffers over the 5 day test period, with the
maximum loss of 5% of initial concentration observed in the pH 9 buffer.
These data indicate that the phosphate ester linkages within the
molecules are stable to hydrolysis at 50°C. The small extent of observed
degradation extrapolated to 25 °C indicates a half life of greater than
1 year at environmental pH 4-9.
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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