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EC number: 276-380-9
CAS number: 72140-65-9
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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