Registration Dossier
Registration Dossier
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EC number: 235-166-5 | CAS number: 12108-13-3
Endpoint summary
Administrative data
Description of key information
Additional information
The stability of mmt is dependent on the presence of light. The substance is not stable either in water or air, in the presence of light; conversely, mmt does not hydrolyze well in the dark. The half-life of mmt in air varies based on methodology used. When measured in the air, first order kinetics show a half-life 8 to 18 seconds, while exposure in a quartz tube results in a half-life determination of 25 to 93 seconds. Nonetheless, it does not exceed 2 minutes.
An accurate assessment of the hydrolysis of mmt could not be performed since the substance did not degrade in absence of sunlight. The estimated half-life of mmt in the absence of light at 25°C is >1year.
The photolysis of mmt in water showed a half-life of 0.9 minutes with a disappearance quantum yield of 0.13 in midday-sunlight. The identified transformation products were cyclopentadiene, methylcyclopentadiene, carbon monoxide and a manganese carbonyl that readily oxidized to trimanganese tetroxide.
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