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EC number: 260-828-5
CAS number: 57583-34-3
If released to the atmosphere, vapour phase MMT(EHTG) will be degraded
by photochemically induced hydroxyl radicals, with a half-life of ca.
9.4 hrs. A Henry’s Law constant of 4.598E-06 predicts that MMT(EHTG)
will volatilise only minimally from surface water; half-lives from a
model river or lake are 350 hours and 168.6 days, respectively. Based on
Level III distribution modelling it is estimated that the majority of
MMT(EHTG) released to the environment will partition into soil (65.7 %)
and sediment (17.4 %), with a somewhat smaller amount in water (16.5 %).
However, due to expected rapid decomposition which would occur upon
contact with water in these media, the extent of inter-media exchange
would be expected to be much less than indicated by the distribution
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