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EC number: 214-014-1 | CAS number: 1072-71-5
The test item 2,5-Dimercapto-1,3,4-thiadiazole (“DMTD”) was tested according to OECD-Guideline 105 with the “Flask Method”.
The criterion of the OECD 105 “If the concentrations measured in at least the two last vessels do not differ by more than 15%, the test is satisfactory. If the results from vessels 1, 2 and 3 show a tendency of increasing values, the whole test should be repeated using longer equilibration times.” is relevant to the saturation curve during the measurement of the water solubility. These criterions are reached by this determination. Therefore the test is valid.
During different runs for determination of the water solubility, the test item formed precipitations in aqueous solution after removing the remaining unsolved parts over several days. These precipitations had two different forms, yellow crystals and white fine particles. The test conditions and the specimen treatment were adapted to avoid these precipitations after the performance of the method given by the OECD 105.
According to the definition of the OECD-Guideline 105 the test item shows a water solubility of 25.9 g/l.
Water solubility: 25.9 g/l at 20°C (flask method, OECD 105, GLP)
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