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Thermal analysis techniques (DSC and TG) were used to characterize the melting and crystallization temperatures as well as the thermal stability of the ionic liquid ethylammonium nitrate. A detailed analysis of the solid-liquid transition is reported monitoring cooling -heating cycles by means of differential scanning calorimetry (DSC) and thermogravimetric balance, in the interval extending from -75 ºC to 100 ºC.The observed melting and solidification temperatures are in good agreement with previously reported ones in electrical conductivity analysis, and a novel cold crystallization at -40 ºC. The thermal analysis confirms the rich phase behaviour of a good glass-former, with a cold crystallization upon heating and a quite large supercooled region (-28, 17 ) ºC. Moreover, a fairly good thermal stability was detected by means of the thermogravimetric analysis up to 140-160 ºC, although the onset temperatures both in air and nitrogen atmospheres were found to lie well above this value.

In this work the effect of addition of different doses of 1-butil-2,3-dimethylimidazolium trifluoromethanesulfonate on microbial activity of a soil under Pinus pinaster Aiton and on the seed germination of species of P. pinaster, Pinus sylvestris L., Pinus radiata D. Don and Eucalyptus globulus Labill were analyzed. Additionally, seed germination test were also applied to this IL after being subjected to heat treatment.

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