<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2010-04-08 22:10:37 UTC</creation_date>
  <update_date>2025-11-18 23:42:55 UTC</update_date>
  <accession>FDB013265</accession>
  <name>Iron(III) oxide (Fe2O3)</name>
  <description>Food colourant especies for sausage casings and pet food (dogs, cats)and is) also used as a constituent of paper/board food packaging materials</description>
  <synonyms>
    <synonym>Anchred standard</synonym>
    <synonym>Anhydrous iron oxide</synonym>
    <synonym>Anhydrous oxide of iron</synonym>
    <synonym>Armenian bole</synonym>
    <synonym>Bauxite residue</synonym>
    <synonym>Black oxide of iron</synonym>
    <synonym>Blended red oxides of iron</synonym>
    <synonym>Burnt sienna</synonym>
    <synonym>Burnt umber</synonym>
    <synonym>Burntisland red</synonym>
    <synonym>C.I. Pigment red 101</synonym>
    <synonym>C.I. Pigment Red 101 and 102</synonym>
    <synonym>C.I. Pigment red 102</synonym>
    <synonym>Calcotone red</synonym>
    <synonym>Caput mortuum</synonym>
    <synonym>Colcothar</synonym>
    <synonym>Colloidal ferric oxide</synonym>
    <synonym>Crocus martis adstringens</synonym>
    <synonym>Deanox</synonym>
    <synonym>Deanox DNX pigments</synonym>
    <synonym>Diiron trioxide</synonym>
    <synonym>Eisenoxyd</synonym>
    <synonym>English red</synonym>
    <synonym>Ferric oxide</synonym>
    <synonym>Ferric oxide (colloidal)</synonym>
    <synonym>Ferric oxide [haematite and ferric oxide]</synonym>
    <synonym>Ferric oxide hydrate</synonym>
    <synonym>Ferric oxide monohydrate</synonym>
    <synonym>Ferric oxide red</synonym>
    <synonym>Ferric sesquioxide</synonym>
    <synonym>Ferrous-ferric oxide</synonym>
    <synonym>Ferrox</synonym>
    <synonym>Ferrugo</synonym>
    <synonym>Gamma-ferric oxide</synonym>
    <synonym>Hematite</synonym>
    <synonym>Hematite mineral</synonym>
    <synonym>Hydrated ferric oxide</synonym>
    <synonym>Hydrous ferric oxide</synonym>
    <synonym>Indian red</synonym>
    <synonym>Indian red oxide</synonym>
    <synonym>Iron oxide</synonym>
    <synonym>Iron oxide (Fe203), hydrate</synonym>
    <synonym>Iron oxide (Fe2O3)</synonym>
    <synonym>Iron oxide (Fe2O3), hydrate</synonym>
    <synonym>Iron oxide dust</synonym>
    <synonym>Iron oxide dust and Fume (Fe2O3)</synonym>
    <synonym>Iron oxide fume</synonym>
    <synonym>Iron oxide pigments</synonym>
    <synonym>Iron oxide red</synonym>
    <synonym>Iron oxide?</synonym>
    <synonym>Iron red</synonym>
    <synonym>Iron sesquioxide</synonym>
    <synonym>Iron trioxide</synonym>
    <synonym>Iron(III) oxide</synonym>
    <synonym>Jeweler's rouge</synonym>
    <synonym>Jewelers rouge</synonym>
    <synonym>Lepidocrocite</synonym>
    <synonym>Levanox Red 130A</synonym>
    <synonym>Light red</synonym>
    <synonym>Maghemite</synonym>
    <synonym>Manufactured iron oxides</synonym>
    <synonym>Mars brown</synonym>
    <synonym>Mars red</synonym>
    <synonym>Natural hematite</synonym>
    <synonym>Natural iron oxides</synonym>
    <synonym>Natural red oxide</synonym>
    <synonym>Ochre</synonym>
    <synonym>Pigment black 11</synonym>
    <synonym>Pigment brown 6</synonym>
    <synonym>Pigment brown 7</synonym>
    <synonym>Pigment Red 101</synonym>
    <synonym>Prussian brown</synonym>
    <synonym>Quick rouge</synonym>
    <synonym>Raddle</synonym>
    <synonym>Red ferric oxide</synonym>
    <synonym>Red iron oxide</synonym>
    <synonym>Red ochre</synonym>
    <synonym>Red oxide</synonym>
    <synonym>Red oxide D3452</synonym>
    <synonym>Red oxide D6984</synonym>
    <synonym>Red oxide of iron</synonym>
    <synonym>Rouge</synonym>
    <synonym>Rubigo</synonym>
    <synonym>Sienna</synonym>
    <synonym>Sienna brown</synonym>
    <synonym>Specular iron</synonym>
    <synonym>Stone red</synonym>
    <synonym>Supra</synonym>
    <synonym>Venetian red</synonym>
    <synonym>Vitriol red</synonym>
    <synonym>Vogel's iron red</synonym>
    <synonym>Yellow ferric oxide</synonym>
    <synonym>Yellow oxide of iron</synonym>
  </synonyms>
  <chemical_formula>Fe2O3</chemical_formula>
  <average_molecular_weight>159.688</average_molecular_weight>
  <monisotopic_moleculate_weight>159.854628132</monisotopic_moleculate_weight>
  <iupac_name>diiron(3+) ion trioxidandiide</iupac_name>
  <traditional_iupac>diiron(3+) ion trioxidandiide</traditional_iupac>
  <cas_registry_number>1309-37-1</cas_registry_number>
  <smiles>[O--].[O--].[O--].[Fe+3].[Fe+3]</smiles>
  <inchi>InChI=1S/2Fe.3O/q2*+3;3*-2</inchi>
  <inchikey>LIKBJVNGSGBSGK-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <description> belongs to the class of inorganic compounds known as miscellaneous mixed metal/non-metals. These are inorganic compounds containing non-metal as well as metal atoms but not belonging to afore mentioned classes.</description>
    <direct_parent>Miscellaneous mixed metal/non-metals</direct_parent>
    <kingdom>Inorganic compounds</kingdom>
    <super_class>Mixed metal/non-metal compounds</super_class>
    <class>Miscellaneous mixed metal/non-metals</class>
    <sub_class/>
    <molecular_framework/>
    <alternative_parents>
      <alternative_parent>Inorganic salts</alternative_parent>
    </alternative_parents>
    <substituents>
      <substituent>Inorganic salt</substituent>
      <substituent>Miscellaneous mixed metal/non-metal</substituent>
    </substituents>
    <external_descriptors>
    </external_descriptors>
  </taxonomy>
  <state/>
  <predicted_properties>
  </predicted_properties>
  <experimental_properties>
  </experimental_properties>
  <property>
    <kind>logp</kind>
    <value>-0.77</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_acidic</kind>
    <value>15.7</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>pka_strongest_basic</kind>
    <value>-1.8</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>iupac</kind>
    <value>diiron(3+) ion trioxidandiide</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>average_mass</kind>
    <value>159.688</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>mono_mass</kind>
    <value>159.854628132</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>smiles</kind>
    <value>[O--].[O--].[O--].[Fe+3].[Fe+3]</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>formula</kind>
    <value>Fe2O3</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchi</kind>
    <value>InChI=1S/2Fe.3O/q2*+3;3*-2</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>inchikey</kind>
    <value>LIKBJVNGSGBSGK-UHFFFAOYSA-N</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polar_surface_area</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>refractivity</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>polarizability</kind>
    <value>1.78</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>rotatable_bond_count</kind>
    <value>0</value>
    <source>ChemAxon</source>
  </property>
  <property>
    <kind>acceptor_count</kind>
    <value>0</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>
  <pathways>
  </pathways>
  <spectra>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>66561</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>66562</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>66563</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>124161</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>124162</spectrum_id>
    </spectrum>
    <spectrum>
      <type>Specdb::MsMs</type>
      <spectrum_id>124163</spectrum_id>
    </spectrum>
  </spectra>
  <hmdb_id/>
  <pubchem_compound_id/>
  <chemspider_id/>
  <kegg_id/>
  <chebi_id>50819</chebi_id>
  <biocyc_id/>
  <het_id/>
  <wikipidia/>
  <vmh_id/>
  <fbonto_id/>
  <foodb_id/>
  <general_references>
  </general_references>
  <foods>
  </foods>
  <flavors>
  </flavors>
  <enzymes>
  </enzymes>
  <health_effects>
  </health_effects>
</compound>
