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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC 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.

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Accession:CHEBI:78433 term browser browse the term
Definition:A substance used in a thermodynamic heat pump cycle or refrigeration cycle that undergoes a phase change from a gas to a liquid and back. Refrigerants are used in air-conditioning systems and freezers or refrigerators and are assigned a 'R' number (by ASHRAE - formerly the American Society of Heating, Refrigerating and Air Conditioning Engineers), which is determined systematically according to their molecular structure.
Synonyms:related_synonym: refrigerants
 xref: Wikipedia:Refrigerant

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    Term Annotations click to browse term
      CHEBI ontology 19773
        role 19719
          application 19403
            refrigerant 17474
              ammonia + 17014
              butane + 73
              carbon dioxide 20
              chloroform + 116
              chloromethane 2
              dichloromethane 184
              diethyl ether 0
              difluoromethane + 0
              dinitrogen oxide 8
              ethane + 6313
              ethene + 3869
              fluoroform + 6412
              fluoromethane 0
              hexachloroethane 0
              hexafluoroethane 0
              isobutane + 727
              isopentane + 3
              methyl formate 0
              pentane + 216
              propene + 3
              sulfur dioxide 131
              tetrachloromethane 7198
              tetrafluoromethane + 6412
              trichlorofluoromethane 0
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