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EC number: 247-426-5
CAS number: 26040-51-7
The substance is hydrolytically unstable showing half-life-times at 50°C
of 30.39 h at pH 4, 44.08 h at pH 7 and 77.52 h at pH 9. One
transformation product was identified as tetrabromophthalic acid.
Biodegradation (screening tests)
According to OECD Guideline 302C (Inherent Biodegradability: Modified
MITI Test (II)) a degradation of 7 % after 28 days was observed. In
conclusion the substance is not inherently biodegradable and as a
conclusion no ready biodegradability is assumed.
Biodegradation (water/sediment, soil)
The substance is considered as not inherently biodegradable. There is no
indication that better biodegradability will be observed in the
water/sediment and soil compartment. Therefore, performance of a study
in water/sediment and soil does not appear scientifically necessary.
Following the OECD Guideline 121 (HPLC method) a logKoc value of 7.3 was
received. This value indicates that the substance has a very strong
sorption potential to soil and sediment and a negligible migration
potential to groundwater.
The study to determine the BMF of bis(2-ethylhexyl)
tetrabromophthalate (TBPH) was conducted according to OECD guideline
305. After 28 days for uptake, and another 28 days for depuration
a kinetic BMFk of 0.004 was determined subsequently, which was corrected
for growth dilution effects resulting in a BMFkg of 0.014. Finally, a
lipid-correction of the BMF was conducted, in order to standardize the
BMF for comparative analyses of the results. The resulting BMFkgL of
0.038 indicates that TBPH is not bioaccumulative to fish of the species
Oncorhynchus mykiss when applied orally and uptake results via the
digestive tract. The critical threshold for classification of substances
to be bioaccumulative are BMF values >1 as suggested in the guidance
document of the European commission for delivering environmental
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