<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2016-05-22 05:27:49 UTC</creation_date>
  <update_date>2026-08-25 06:10:42 UTC</update_date>
  <accession/>
  <common_name>Pyridoxal</common_name>
  <class>SmallMolecule</class>
  <description>Pyridoxal is an organic compound with the formula C8H9NO3 and an average molecular weight of 167.16 g/mol. Pyridoxal belongs to the pyridine carboxaldehydes, a subclass of pyridines and derivatives within the organic compounds.

This compound has been identified in or released from 30 recorded sources. Within the category of food, food processing, and cookware, it is associated with fermentation processes for beer, the preparation of malt, food preservation, molasses and treatment of molasses, and agglomerated sugar products, among six other sources. In household cleaning and consumer products, it is found in bleaching agents, ash trays, cigar cigarettes, other smoking requisites, non electric simulated smoking devices, and five additional sources. It is also present in building and construction materials, specifically tents or canopies. Furthermore, it is found in electrical and electronic equipment, including amplifiers, antennas, discharge lamps, electric hearing aids, and conductors or conductive bodies characterised by the conductive materials, along with three other sources. Regarding its biological activity, pyridoxal has one recorded protein target, which is pyridoxal kinase (PDXK).</description>
  <categories/>
  <types/>
  <synonyms>
    <synonym>Isopyridoxal</synonym>
  </synonyms>
  <chemical_formula>C8H9NO3</chemical_formula>
  <average_molecular_weight>167.162</average_molecular_weight>
  <monisotopic_moleculate_weight>167.058243159</monisotopic_moleculate_weight>
  <iupac_name>3-hydroxy-5-(hydroxymethyl)-2-methylpyridine-4-carbaldehyde</iupac_name>
  <traditional_iupac>pyridoxal</traditional_iupac>
  <cas_registry_number>66-72-8</cas_registry_number>
  <smiles>CC1=NC=C(CO)C(C=O)=C1O</smiles>
  <inchi>InChI=1S/C8H9NO3/c1-5-8(12)7(4-11)6(3-10)2-9-5/h2,4,10,12H,3H2,1H3</inchi>
  <inchikey>RADKZDMFGJYCBB-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organoheterocyclic compounds</super_class>
    <class>Pyridines and derivatives</class>
    <sub_class>Pyridine carboxaldehydes</sub_class>
    <direct_parent>Pyridoxals and derivatives</direct_parent>
    <alternate_parents>
      <alternative_parent>Aromatic alcohols</alternative_parent>
      <alternative_parent>Aryl-aldehydes</alternative_parent>
      <alternative_parent>Azacyclic compounds</alternative_parent>
      <alternative_parent>Heteroaromatic compounds</alternative_parent>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>Hydroxypyridines</alternative_parent>
      <alternative_parent>Methylpyridines</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
      <alternative_parent>Organonitrogen compounds</alternative_parent>
      <alternative_parent>Organopnictogen compounds</alternative_parent>
      <alternative_parent>Primary alcohols</alternative_parent>
      <alternative_parent>Vinylogous acids</alternative_parent>
    </alternate_parents>
    <substituents>
      <substituent>Alcohol</substituent>
      <substituent>Aldehyde</substituent>
      <substituent>Aromatic alcohol</substituent>
      <substituent>Aromatic heteromonocyclic compound</substituent>
      <substituent>Aryl-aldehyde</substituent>
      <substituent>Azacycle</substituent>
      <substituent>Heteroaromatic compound</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Hydroxypyridine</substituent>
      <substituent>Methylpyridine</substituent>
      <substituent>Organic nitrogen compound</substituent>
      <substituent>Organic oxide</substituent>
      <substituent>Organic oxygen compound</substituent>
      <substituent>Organonitrogen compound</substituent>
      <substituent>Organooxygen compound</substituent>
      <substituent>Organopnictogen compound</substituent>
      <substituent>Primary alcohol</substituent>
      <substituent>Pyridoxal</substituent>
      <substituent>Vinylogous acid</substituent>
    </substituents>
    <molecular_framework>Aromatic heteromonocyclic compounds</molecular_framework>
    <descriptors>
      <descriptor>Water-soluble vitamins</descriptor>
      <descriptor>a vitamin B6</descriptor>
      <descriptor>hydroxymethylpyridine</descriptor>
      <descriptor>methylpyridines</descriptor>
      <descriptor>monohydroxypyridine</descriptor>
      <descriptor>pyridinecarbaldehyde</descriptor>
      <descriptor>vitamin B6</descriptor>
    </descriptors>
  </taxonomy>
  <status>Detected and Not Quantified</status>
  <origin/>
  <cellular_locations/>
  <biofluid_locations/>
  <tissue_locations/>
  <pathways>
    <pathway>
      <name>Valine, Leucine, and Isoleucine Degradation</name>
      <smpdb_id>SMP0000032</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Vitamin B6 Metabolism</name>
      <smpdb_id>SMP0000017</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>beta-Ketothiolase Deficiency</name>
      <smpdb_id>SMP0000173</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>2-Methyl-3-hydroxybutyryl-CoA Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0000137</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Propionic Acidemia</name>
      <smpdb_id>SMP0000236</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Hydroxy-3-methylglutaryl-CoA Lyase Deficiency</name>
      <smpdb_id>SMP0000138</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Maple Syrup Urine Disease</name>
      <smpdb_id>SMP0000199</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylcrotonyl-CoA Carboxylase Deficiency Type I</name>
      <smpdb_id>SMP0000237</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylglutaconic Aciduria Type I</name>
      <smpdb_id>SMP0000139</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylglutaconic Aciduria Type III</name>
      <smpdb_id>SMP0000140</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Methylmalonate Semialdehyde Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0000384</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Methylmalonic Aciduria</name>
      <smpdb_id>SMP0000200</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Isovaleric Aciduria</name>
      <smpdb_id>SMP0000238</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylglutaconic Aciduria Type IV</name>
      <smpdb_id>SMP0000141</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Hypophosphatasia</name>
      <smpdb_id>SMP0000503</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Hydroxyisobutyric Acid Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0000521</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Hydroxyisobutyric Aciduria</name>
      <smpdb_id>SMP0000522</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Isobutyryl-CoA Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0000523</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Isovaleric Acidemia</name>
      <smpdb_id>SMP0000524</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Hypophosphatasia</name>
      <smpdb_id>SMP0125622</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>beta-Ketothiolase Deficiency</name>
      <smpdb_id>SMP0125657</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>2-Methyl-3-hydroxybutyryl-CoA Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0125658</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Propionic Acidemia</name>
      <smpdb_id>SMP0125659</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Hydroxy-3-methylglutaryl-CoA Lyase Deficiency</name>
      <smpdb_id>SMP0125660</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Maple Syrup Urine Disease</name>
      <smpdb_id>SMP0125661</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylcrotonyl-CoA Carboxylase Deficiency Type I</name>
      <smpdb_id>SMP0125662</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylglutaconic Aciduria Type I</name>
      <smpdb_id>SMP0125664</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylglutaconic Aciduria Type III</name>
      <smpdb_id>SMP0125667</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Methylmalonate Semialdehyde Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0125669</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Methylmalonic Aciduria</name>
      <smpdb_id>SMP0125670</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Isovaleric Aciduria</name>
      <smpdb_id>SMP0125671</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Methylglutaconic Aciduria Type IV</name>
      <smpdb_id>SMP0125672</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Hydroxyisobutyric Acid Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0125673</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>3-Hydroxyisobutyric Aciduria</name>
      <smpdb_id>SMP0125674</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Isobutyryl-CoA Dehydrogenase Deficiency</name>
      <smpdb_id>SMP0125675</smpdb_id>
      <kegg_map_id/>
    </pathway>
    <pathway>
      <name>Isovaleric Acidemia</name>
      <smpdb_id>SMP0125676</smpdb_id>
      <kegg_map_id/>
    </pathway>
  </pathways>
  <state/>
  <appearance/>
  <experimental_properties>
    <property>
      <kind>logp</kind>
      <value>0.18</value>
    </property>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>0.02</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-1.16</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>1.17e+01 g/l</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>0.18</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_acidic</kind>
      <value>7.97</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_basic</kind>
      <value>4.11</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>3-hydroxy-5-(hydroxymethyl)-2-methylpyridine-4-carbaldehyde</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>167.162</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>167.058243159</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>CC1=NC=C(CO)C(C=O)=C1O</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C8H9NO3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C8H9NO3/c1-5-8(12)7(4-11)6(3-10)2-9-5/h2,4,10,12H,3H2,1H3</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>RADKZDMFGJYCBB-UHFFFAOYSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>70.42</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>43.87</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>16.28</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>2</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>donor_count</kind>
      <value>2</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/>
  <toxicity/>
  <lethaldose/>
  <carcinogenicity/>
  <use_source/>
  <min_risk_level/>
  <health_effects>#&lt;HealthEffect::ActiveRecord_Associations_CollectionProxy:0x00007f72754a8488&gt;</health_effects>
  <symptoms/>
  <treatment/>
  <drugbank_id>DB00147</drugbank_id>
  <hmdb_id/>
  <pubchem_compound_id>1050</pubchem_compound_id>
  <chembl_id/>
  <chemspider_id>1021</chemspider_id>
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  <biocyc_id/>
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  <actor_id/>
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  <wikipidia/>
  <general_references/>
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    <target>
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  </targets>
</compound>
