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EC number: 206-108-6
CAS number: 301-10-0
The tin bis(2 -ethylhexanoate) substance is known to dissociate into its
2-ethylhexanoate and Sn(II) components upon introduction to water. The
2-ethylhexanoate portion of the substance has been shown to be readily
biodegradable (90.1% in 7days based on DOC), while the Sn(II) will
speciate initially as Sn(OH)2, and spontaneously oxidize in
oxygenated water to form the insoluble inorganic solid Sn(IV)O2.
Tin bis(2 -ethylhexanoate) does not meet the P or vP criteria.
The log Kow for the 2-ethylhexanoate component of the tin bis(2
-ethylhexanoate) salt is log Kow = 2.64 (un-ionized species at pH <
2.8). The estimated log D at pH 7 is approximately 0.6. These values of
log Kow and log D indicate a low potential for bioaccumulation in
aquatic organisms. The Sn(II) portion of the salt is inorganic and
oxidizes in water to form Sn (IV)O2 which is insoluble, therefore
bioaccumulation is unlikely.
Tin bis(2 -ethylhexanoate) does not meet the B or vB criteria.
For algae, the most sensitive species, the 72-hour NOEC and EC50 (based
on growth rate) forPseudokirchneriella subcapitata exposed to tin
bis(2-ethylhexanoate)were 0.54 and 6.9 mg/L, respectively.
These values are above the criteria for T for aquatic toxicity. The
substance meets however the T criteria due to a classification as
Reproductive toxicant Category 2 based on the hydrolysis to 2 -ethyl
Conclusion: the substance meets the T criterion.
Overall Result of the PBT assessment:
The substance does not meet the individual P or B criteria, only the
T criterion, so that it is not a PBT substance nor a vPvB substance.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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