<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2016-06-03 13:27:18 UTC</creation_date>
  <update_date>2026-08-22 18:05:46 UTC</update_date>
  <accession/>
  <common_name>2-amino-5-methylthiazole</common_name>
  <class>SmallMolecule</class>
  <description>2-amino-5-methylthiazole is an organic compound with the chemical formula C4H6N2S and an average molecular weight of 114.17 g/mol. 2-amino-5-methylthiazole belongs to the thiazoles, a subclass of azoles within the organic compounds.

The compound has been detected in or released from 19 recorded sources. Within drinking water and water supply, it is found in tap water, bottled water, desalinated water, and drinking water. It is present in aquatic systems and sediments, including seawater, freshwater, groundwater, and surface water. Its presence is also noted in wastewater, sanitation, and biosolids, specifically in wastewater treatment effluent, mine wastewater, industrial wastewater, and unspecified wastewater. Additionally, the compound is associated with appliances, HVAC, and refrigerants, such as water heaters and water coolers. In the sectors of marine, shipping, and aquaculture, it is found in bilge water and ballast water, while agriculture and land management sources include irrigation water. Two more sectors have also been recorded. Recorded exposure routes for 2-amino-5-methylthiazole include touch, oral, and inhalation.</description>
  <categories/>
  <types>
    <type>PMT</type>
  </types>
  <synonyms/>
  <chemical_formula>C4H6N2S</chemical_formula>
  <average_molecular_weight>114.17</average_molecular_weight>
  <monisotopic_moleculate_weight>114.025169375</monisotopic_moleculate_weight>
  <iupac_name>5-methyl-2,3-dihydro-1,3-thiazol-2-imine</iupac_name>
  <traditional_iupac>5-methyl-3H-1,3-thiazol-2-imine</traditional_iupac>
  <cas_registry_number>7305-71-7</cas_registry_number>
  <smiles>CC1=CNC(=N)S1</smiles>
  <inchi>InChI=1S/C4H6N2S/c1-3-2-6-4(5)7-3/h2H,1H3,(H2,5,6)</inchi>
  <inchikey>GUABFMPMKJGSBQ-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organoheterocyclic compounds</super_class>
    <class>Azoles</class>
    <sub_class>Thiazoles</sub_class>
    <direct_parent>2,5-disubstituted thiazoles</direct_parent>
    <alternate_parents>
      <alternative_parent>2-amino-1,3-thiazoles</alternative_parent>
      <alternative_parent>Azacyclic compounds</alternative_parent>
      <alternative_parent>Heteroaromatic compounds</alternative_parent>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>Organopnictogen compounds</alternative_parent>
      <alternative_parent>Primary amines</alternative_parent>
    </alternate_parents>
    <substituents>
      <substituent>1,3-thiazol-2-amine</substituent>
      <substituent>2,5-disubstituted 1,3-thiazole</substituent>
      <substituent>Amine</substituent>
      <substituent>Aromatic heteromonocyclic compound</substituent>
      <substituent>Azacycle</substituent>
      <substituent>Heteroaromatic compound</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Organic nitrogen compound</substituent>
      <substituent>Organonitrogen compound</substituent>
      <substituent>Organopnictogen compound</substituent>
      <substituent>Primary amine</substituent>
    </substituents>
    <molecular_framework>Aromatic heteromonocyclic compounds</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>1</value>
    </property>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>0.07</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-1.29</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>5.80e+00 g/l</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>0.77</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_acidic</kind>
      <value>11.46</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_basic</kind>
      <value>3.24</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>5-methyl-2,3-dihydro-1,3-thiazol-2-imine</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>114.17</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>114.025169375</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>CC1=CNC(=N)S1</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C4H6N2S</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C4H6N2S/c1-3-2-6-4(5)7-3/h2H,1H3,(H2,5,6)</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>GUABFMPMKJGSBQ-UHFFFAOYSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>35.88</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>43.13</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>11.45</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>2</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/>
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  <metabolism/>
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  <lethaldose/>
  <carcinogenicity/>
  <use_source/>
  <min_risk_level/>
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  <symptoms/>
  <treatment/>
  <drugbank_id/>
  <hmdb_id/>
  <pubchem_compound_id>351770</pubchem_compound_id>
  <chembl_id/>
  <chemspider_id>312333</chemspider_id>
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</compound>
