Registration Dossier
Registration Dossier
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EC number: 254-671-1 | CAS number: 39881-32-8
Stability: thermal, sunlight, metals
Administrative data
Link to relevant study record(s)
Description of key information
Thermal Stability: DSC TA8000
1) endothermic effect in the temperature range 145-390° C
2) two endothermic effects in the temperature range 100 - 125 °C and 175 - 385 °C
3) endothermic effect in the temperature range 165 - 340 °C
Additional information
Dibutylmagnesium is a metalating reagent. The magnesium atom has a polarization effect on neighbouring carbon atom resulting in a negative partial charge. This carbon-atom is highly reactive towards active hydrogen-compounds such as water, carbon acids and alcohols. Dibutylmagnesium is not stable and react vigorously with water liberating flammable butane-gas which might ignite spontaneously in atmospheres with inadequate inert gas protection. Therefore Dibutylmagnesium should always be handled and stored under exclusion of water/humidity securing an inert gas atmosphere. Thus, it is only marketed and stabilised in an organic solution under the protection of N2 or inert gas. Therefore, the thermal stanility is mainly influenced by the solvent.
Justification for classification or non-classification
No exothermic effect was observed in the DSC-measurements. Due to these results the test item does not have to be classified as “explosive”, class 1, according to the transport regulations and chapter 2.1 according GHS (CLP) regulations
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