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EC number: 218-320-6
CAS number: 2116-84-9
No test data are available with tris(trimethylsiloxy)phenylsilane
(CAS 2116-84-9) and terrestrial testing is not a requirement under Annex
VII of REACH. However, due to the high log Kow and low water
solubility of the registration substance some discussion of the
potential for testing of toxicity to terrestrial organisms may be
Testing for toxicity to terrestrial organisms with soil
micro-organisms and a stability test under OECD 222 (earthworm
reproduction test) conditions have been carried out with
Octamethyltrisiloxane (L3, CAS 107-51-7), a member of the same analogue
group as tris(trimethylsiloxy)phenylsilane.
The tests with L3 have demonstrated that there was significant
loss of test item from the test system, very early on during the tests,
even though efforts had been taken to minimise losses through
volatility. The studies indicate that L3 is too volatile to maintain
adequate concentrations in the test system.
Although the vapour pressure and Henry's Law Constant values (HLC)
of the registration substance are much lower than those of L3, tris(trimethylsiloxy)phenylsilane
still has a high calculated HLC (4.95E+03 Pa m3mol-1),
indicating that the susbstance is highly volatile. Therefore, similar
experimental difficulties to those with L3 would be expected if
terrestrial tests were carried out.
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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