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OECD SIDS<br />
4-<strong>METHYLPENTAN</strong>-2-<strong>OL</strong><br />
2.2.2 Photodegradation<br />
The indirect photodegradation of MIBC by reaction with hydroxyl radicals in the atmosphere is<br />
estimated to occur with a half-life of approximately 10 hours (12-hr day; 1.5E06 OH/cm 3 ) (U.S.<br />
EPA, 2000c).<br />
2.2.3 Stability in Water<br />
MIBC does not react with water; the only functionality other than carbon-carbon and carbonhydrogen<br />
bonds is the hydroxyl group, which does not hydrolyze.<br />
2.2.4 Transport between Environmental Compartments<br />
The theoretical distribution of MIBC has been estimated using the fugacity model of Mackay, Level<br />
I (Canadian Environmental Modeling Centre, 1999). According to this model, MIBC released into<br />
the environment partitions to air, water, and soil phases with 37.8%, 59.6% and 2.5%, in the<br />
respective compartments.<br />
The environmental distribution of MIBC has also been examined using the Level III fugacity model<br />
(U.S. EPA, 2000b). MIBC is used in several different processes. Therefore, potential release<br />
scenarios were examined as outlined in the following table:<br />
Table 2<br />
Environmental Distribution<br />
Distribution<br />
% Predicted in<br />
Air<br />
% Predicted in<br />
Water<br />
% Predicted in<br />
Soil<br />
Equal (Air, Water, Soil) 3.6 45 51
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