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EC number: 206-108-6
CAS number: 301-10-0
The surface tension of the dissociation/hydrolysis products of Tin bis(2-ethylhexanoate) at 1% wt. in water is 55.9 mN/m at 20.5 °C
The surface tension of Tin bis(2-ethylhexanoate) and its
dissociation/hydrolysis products in water were determined using the OECD
Guideline 115 (ring method). Tin bis(2-ethylhexanoate) is a salt which
dissociates upon introduction to water. At pH > 6.8, the Sn(II) cation
is reported to initially form Sn(OH)2, which is spontaneously
oxidized (in oxygenated water) to form the insoluble solid Sn(IV)O2.
The pKa for the 2-ethyl hexanoic acid anion is 4.8, and therefore exists
primarily as the anionic species at pH > 6.8. The results of this study
are expected to reflect the surface-active properties of the
water-soluble dissociation products of Tin bis(2-ethylhexanoate) (i.e.,2
-ethylhexanoic acid). This substance, having a hydrophylic carboxylate
group and hydrophobic C7 hydrocarbon tail, is expected to exhibit
surface-active properties, as evidenced in the results of this study.
The reported surface tension of an approximately 0.1% wt. solution of
the dissociation products of tin bis(2-ethylhexanoate) is 55.9 mN/m at
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