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MTDID 15670 is an ionic solid with a low vapor pressure. It will not volatilize to the atmospheric compartment. It is hydrolytically active. Measured hydrolysis half-life values are 2.08 hours at pH 7 and 4 °C, and 4.59 hours at pH 4 and 50 °C. The half-life at pH 9 was too short be determined analytically. The hydrolysis products are crotononitrile (CAS# 4786-20-3), dodecyl ethyl sulfide (No CAS#), and tetrafluoroboric acid, CAS# 16872-11-0 (dissociates to tetrafluoroborate in aqueous solution). Crotonitrile is expected to be rapidly removed from aquatic systems. Dodecyl ethyl sulfide is expected to be not persistent. Bioconcentration data are not available for the hydrolysis products. Based on estimated log Kow values, crotonitrile is expected not to bioaccumulate (modeled Kow = 0.62) while dodecyl ethyl sulfide (modeled log Kow = 6.8) is expected to be bioaccumulative or possibly very bioaccumulative. Organic carbon normalized adsorption coefficients were also calculated based on log Kow values. Crotononitrile is expected to have little tendency to sorb (Koc = 22) while dodecyl ethyl sulfide would sorb quite strongly (Koc = 410,000). Tetrafluoroboric acid will exist in dissociated form and as an inorganic anion is not subject partition or sorbtion to soils.

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