<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2026-08-22 23:06:00 UTC</creation_date>
  <update_date>2026-08-22 23:06:00 UTC</update_date>
  <accession/>
  <common_name>3-methylideneoxolane-2,5-dione</common_name>
  <class>SmallMolecule</class>
  <description>3-methylideneoxolane-2,5-dione is an organic compound with the formula C5H4O3 and an average molecular weight of 112.08 g/mol. 3-methylideneoxolane-2,5-dione belongs to the dicarboxylic acids and derivatives, a subclass of carboxylic acids and derivatives within the organic compounds.

The compound is found in or released from 16 recorded sources across several categories. Within electrical and electronic equipment, it is associated with antennas, coils, communication cables or conductors, cores yokes or armatures, discharge lamps, and six additional sources. In the context of food, food processing and cookware, it is linked to the preparation of wort, fermentation processes for beer, and the processing of meats. Furthermore, the compound is found in building and construction materials, specifically roofs, as well as in household cleaning and consumer products, specifically cigar cigarettes.</description>
  <categories/>
  <types/>
  <synonyms/>
  <chemical_formula>C5H4O3</chemical_formula>
  <average_molecular_weight>112.08</average_molecular_weight>
  <monisotopic_moleculate_weight>112.016044</monisotopic_moleculate_weight>
  <iupac_name/>
  <traditional_iupac/>
  <cas_registry_number>25300-97-4</cas_registry_number>
  <smiles/>
  <inchi>InChI=1S/C5H4O3/c1-3-2-4(6)8-5(3)7/h1-2H2</inchi>
  <inchikey>OFNISBHGPNMTMS-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <kingdom/>
    <super_class/>
    <class/>
    <sub_class/>
    <direct_parent/>
    <alternate_parents/>
    <substituents/>
    <molecular_framework/>
    <descriptors/>
  </taxonomy>
  <status>Detected and Not Quantified</status>
  <origin/>
  <cellular_locations/>
  <biofluid_locations/>
  <tissue_locations/>
  <pathways/>
  <state/>
  <appearance/>
  <experimental_properties>
    <property>
      <kind>logp</kind>
      <value>0.2</value>
    </property>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>average_mass</kind>
      <value>112.08</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>112.016044</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C5H4O3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C5H4O3/c1-3-2-4(6)8-5(3)7/h1-2H2</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>OFNISBHGPNMTMS-UHFFFAOYSA-N</value>
      <source>ChemAxon</source>
    </property>
  </predicted_properties>
  <route_of_exposure/>
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  <metabolism/>
  <toxicity/>
  <lethaldose/>
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  <use_source/>
  <min_risk_level/>
  <health_effects>#&lt;HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f72261ce7e8&gt;</health_effects>
  <symptoms/>
  <treatment/>
  <drugbank_id/>
  <hmdb_id/>
  <pubchem_compound_id>75110</pubchem_compound_id>
  <chembl_id/>
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  <biocyc_id/>
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