<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2016-05-19 02:14:48 UTC</creation_date>
  <update_date>2026-04-16 21:12:20 UTC</update_date>
  <accession/>
  <common_name>3-METHYL-2-BUTENAL</common_name>
  <class>SmallMolecule</class>
  <description>3-METHYL-2-BUTENAL belongs to the carbonyl compounds, a subclass of organooxygen compounds within the organic compounds. This organic oxygen compound has the chemical formula C5H8O and an average molecular weight of 84.12 g/mol. Industrially, it is utilized as a fragrance, as well as a flavouring and nutrient.

The compound is recorded in six different sources. It is found in household cleaning and consumer products, specifically bleaching agents and cigar cigarettes, and is present in drinking water and water supply systems. It is also detected in indoor air, dust, and atmospheric transport, as well as in auxiliary devices within electrical and electronic equipment. Additionally, it is associated with food, cookware, and food processing, specifically within fermentation processes for beer. Recorded routes of exposure include inhalation and oral ingestion. Regarding plastics, 3-METHYL-2-BUTENAL has been detected in polyethylene terephthalate, although it was not detected in low-density polyethylene.</description>
  <categories/>
  <types/>
  <synonyms>
    <synonym>2-Butenal, 3-methyl-</synonym>
    <synonym>3-Methylbut-2-enal</synonym>
  </synonyms>
  <chemical_formula>C5H8O</chemical_formula>
  <average_molecular_weight>84.1164</average_molecular_weight>
  <monisotopic_moleculate_weight>84.057514878</monisotopic_moleculate_weight>
  <iupac_name>3-methylbut-2-enal</iupac_name>
  <traditional_iupac>prenal</traditional_iupac>
  <cas_registry_number>107-86-8</cas_registry_number>
  <smiles>CC(C)=CC=O</smiles>
  <inchi>InChI=1S/C5H8O/c1-5(2)3-4-6/h3-4H,1-2H3</inchi>
  <inchikey>SEPQTYODOKLVSB-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organic oxygen compounds</super_class>
    <class>Organooxygen compounds</class>
    <sub_class>Carbonyl compounds</sub_class>
    <direct_parent>Enals</direct_parent>
    <alternate_parents>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
      <alternative_parent>Short-chain aldehydes</alternative_parent>
    </alternate_parents>
    <substituents>
      <substituent>Aldehyde</substituent>
      <substituent>Aliphatic acyclic compound</substituent>
      <substituent>Enal</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Organic oxide</substituent>
      <substituent>Short-chain aldehyde</substituent>
    </substituents>
    <molecular_framework>Aliphatic acyclic compounds</molecular_framework>
    <descriptors>
      <descriptor>a small molecule</descriptor>
      <descriptor>enal</descriptor>
    </descriptors>
  </taxonomy>
  <status>Detected and Not Quantified</status>
  <origin/>
  <cellular_locations/>
  <biofluid_locations/>
  <tissue_locations/>
  <pathways/>
  <state/>
  <appearance/>
  <experimental_properties/>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>0.97</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-0.12</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>6.36e+01 g/l</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_basic</kind>
      <value>-3.9</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>3-methylbut-2-enal</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>84.1164</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>84.057514878</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>CC(C)=CC=O</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C5H8O</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C5H8O/c1-5(2)3-4-6/h3-4H,1-2H3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>SEPQTYODOKLVSB-UHFFFAOYSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>17.07</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>26.32</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>9.51</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>donor_count</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>physiological_charge</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formal_charge</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
  </predicted_properties>
  <route_of_exposure/>
  <mechanism_of_toxicity/>
  <metabolism/>
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  <lethaldose/>
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  <use_source/>
  <min_risk_level/>
  <health_effects>#&lt;HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f722603ec48&gt;</health_effects>
  <symptoms/>
  <treatment/>
  <drugbank_id/>
  <hmdb_id/>
  <pubchem_compound_id>61020</pubchem_compound_id>
  <chembl_id/>
  <chemspider_id>54980</chemspider_id>
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</compound>
