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EC number: 212-039-2
CAS number: 753-73-1
Key study: Spruit & Schilt (2003): -2.18 ± 0.17 (22.0 ± 1.0 °C)
study was a reliable Klimisch 1 study, conducted in accordance with OECD
117 guideline and EU guidelines and to GLP standard. The log partition
coefficient n-octanol/water (log Pow) was determined to be -2.18 ± 0.17
(22.0 ± 1.0 °C).However,
in water, DMTC undergoes rapid degradation by hydrolysis and is expected
to hydrolyze within minutes. DMTC
has sufficient water solubility that it can be studied in water using
analytical methods that involve derivatization. This
analysis method only measures the amount of the alkyltin moiety, but
cannot identify the other ligands attached to the tin. Further,
low levels of impurities may be present, even in a high purity organotin
impurities often are more soluble in water than the named substance and
confound the measurement of water solubility of the named substance to a
significant degree. Thus,
the reported value may not be due entirely to the named substance and
any subsequent use of the partition coefficient to predict environmental
behavior of the named substance must carefully consider the limitations
inherent in the measurement of this parameter
supporting studies range from a log Pow of -2.18 to -3.1, with the
exception of one outlier from a QSAR method (Log Pow -1.056), which can
be ignored on the basis that the calculation method used has not been
fully validated for substances containing a metal ion.
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