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EC number: 293-927-7
CAS number: 91648-65-6
Key information: Boiling point (OECD 103 / EU Method A.2, DSC): decomposition at approx. 223 °C, no boiling point temperature determined. Disregarded study: Boiling point (OECD 103, Siwoloboff method): approx. 125.2 °C at 755 mmHg.
The test substance decomposes at approx. 223
°C (Fox, 2012). The determination was performed according to EU Method
A.2 using a Differential Scanning Calorimeter (DSC).
The Siwoloboff method, used in the other
experiment (Rocchio, 1990) is only applicable for liquids which will not
undergo any chemical reaction below their boiling point (i.e.
autooxidation, degradation or any rearrangement). Taking this into
account, it seems that this test method is not applicable for the test
substance and the obtained boiling point (125 °C) has to be interpreted
with care: it is very likely that the substance decomposed under heating
(probably at the sulphur bridging bonds) into smaller product(s) and the
emergence of these product(s) was registered as boiling point for the
whole test substance. Finally, the result of the DSC (key study)
confirms that no value for a boiling point temperature could be
determined: the substance decomposes below the boiling point at approx.
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