The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/by/3.0/). For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.
An organoammonium salt resulting from the mixing of equimolar amounts of nitric acid and ethylamine. First prepared in 1914, it was one of the first ionic liquids found that had a melting point below room temperature (m.p. 12degreeC).