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Physical & Chemical properties

Partition coefficient

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Description of key information

Determining a single log Kow for a multiconstituent substance like reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was not possible. Based on an HPLC method, the log Kow was measured to be in the range 0.59 - 3.79. As an intermediate value, the log Kow measured for DIPE (2.37), which is one of the main constituents with ca. 30% of the substance is proposed.

Key value for chemical safety assessment

Log Kow (Log Pow):
2.37
at the temperature of:
25 °C

Additional information

Determining a single log Kow for a multiconstituent substance like reaction mass of 2,2'-oxybisbutane (DSBE), DIPE, SBA and 2-methylpropan-2-ol (TBA) was not possible. Based on an HPLC method, the log Kow was determined to be in the range 0.59 - 3.79. As an intermediate value, the log Kow measured for DIPE (2.37), which is one of the main constituents with ca. 30% of the substance is proposed.

Literature log Kow values of the main components of the reaction mass lie within the same range as the QSAR estimated or experimentally determined values discussed above: DSBE: 2.87 -3.21 (1, 3); DIPE: 1.52 (2); SBA: 0.61 (3); TBA: 0.35 (3), thus confirming the validity of the measured data.

References:

(1) Estimation Program Interface (EPI) Suite,2000-2009, U.S. Environmental Protection Agency (see HPV-report)

(2) Noriaki Funasaki, Sakae Hada, Saburo Neya, J. Phys. Chem., 1985, 89 (14), pp 3046–3049: Partition coefficients of aliphatic ethers - molecular surface area approach

(3) Hansch, C., and Leo, A. (1995).Exploring QSAR. Fundamentals and Applications in Chemistry and Biology.ACS Professional Reference Book, American Chemical Society, Washington, DC.