<?xml version="1.0" encoding="UTF-8"?>
<compound>
  <version>1.0</version>
  <creation_date>2016-05-19 03:50:12 UTC</creation_date>
  <update_date>2026-08-23 18:28:50 UTC</update_date>
  <accession/>
  <common_name>1,2,4-Butanetricarboxylic acid, 2-phosphono-</common_name>
  <class>SmallMolecule</class>
  <description>1,2,4-Butanetricarboxylic acid, 2-phosphono- is an organic compound with the formula C7H11O9P and an average molecular weight of 270.13 g/mol. 1,2,4-Butanetricarboxylic acid, 2-phosphono- belongs to the tricarboxylic acids and derivatives, a subclass of carboxylic acids and derivatives within the organic compounds. In industrial applications, this substance is utilized as a chelating agent, a pH regulating agent, and a corrosion inhibitor.

The compound has been identified in 19 recorded sources across several sectors. Within drinking water and water supply, it is found in tap water, bottled water, desalinated water, and general drinking water. It is present in aquatic systems and sediments, including freshwater, seawater, groundwater, and surface water. In the sector of wastewater, sanitation, and biosolids, it is recorded in mine wastewater, industrial wastewater, wastewater treatment effluent, and unspecified wastewater. Additionally, it is found in irrigation water used in agriculture and land management, and in bilge water and ballast water associated with marine, shipping, and aquaculture. The compound is also linked to appliances, HVAC, and refrigerants, specifically appearing in water heaters and water coolers. Exposure to 1,2,4-Butanetricarboxylic acid, 2-phosphono- can occur through oral, inhalation, and touch routes.</description>
  <categories/>
  <types>
    <type>PMT</type>
  </types>
  <synonyms/>
  <chemical_formula>C7H11O9P</chemical_formula>
  <average_molecular_weight>270.13</average_molecular_weight>
  <monisotopic_moleculate_weight>270.014068932</monisotopic_moleculate_weight>
  <iupac_name>2-phosphonobutane-1,2,4-tricarboxylic acid</iupac_name>
  <traditional_iupac>2-phosphonobutane-1,2,4-tricarboxylic acid</traditional_iupac>
  <cas_registry_number>37971-36-1</cas_registry_number>
  <smiles>OC(=O)CCC(CC(O)=O)(C(O)=O)P(O)(O)=O</smiles>
  <inchi>InChI=1S/C7H11O9P/c8-4(9)1-2-7(6(12)13,3-5(10)11)17(14,15)16/h1-3H2,(H,8,9)(H,10,11)(H,12,13)(H2,14,15,16)</inchi>
  <inchikey>SZHQPBJEOCHCKM-UHFFFAOYSA-N</inchikey>
  <taxonomy>
    <kingdom>Organic compounds</kingdom>
    <super_class>Organic acids and derivatives</super_class>
    <class>Carboxylic acids and derivatives</class>
    <sub_class>Tricarboxylic acids and derivatives</sub_class>
    <direct_parent>Tricarboxylic acids and derivatives</direct_parent>
    <alternate_parents>
      <alternative_parent>Carbonyl compounds</alternative_parent>
      <alternative_parent>Carboxylic acids</alternative_parent>
      <alternative_parent>Hydrocarbon derivatives</alternative_parent>
      <alternative_parent>Organic oxides</alternative_parent>
      <alternative_parent>Organic phosphonic acids</alternative_parent>
      <alternative_parent>Organophosphorus compounds</alternative_parent>
      <alternative_parent>Organopnictogen compounds</alternative_parent>
    </alternate_parents>
    <substituents>
      <substituent>Aliphatic acyclic compound</substituent>
      <substituent>Carbonyl group</substituent>
      <substituent>Carboxylic acid</substituent>
      <substituent>Hydrocarbon derivative</substituent>
      <substituent>Organic oxide</substituent>
      <substituent>Organic oxygen compound</substituent>
      <substituent>Organooxygen compound</substituent>
      <substituent>Organophosphonic acid</substituent>
      <substituent>Organophosphonic acid derivative</substituent>
      <substituent>Organophosphorus compound</substituent>
      <substituent>Organopnictogen compound</substituent>
      <substituent>Tricarboxylic acid or derivatives</substituent>
    </substituents>
    <molecular_framework>Aliphatic acyclic 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>-2.8</value>
    </property>
  </experimental_properties>
  <predicted_properties>
    <property>
      <kind>logp</kind>
      <value>-1.13</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logs</kind>
      <value>-1.11</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>solubility</kind>
      <value>2.12e+01 g/l</value>
      <source>ALOGPS</source>
    </property>
    <property>
      <kind>logp</kind>
      <value>-1.8</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>pka_strongest_acidic</kind>
      <value>1.51</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>iupac</kind>
      <value>2-phosphonobutane-1,2,4-tricarboxylic acid</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>average_mass</kind>
      <value>270.13</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>mono_mass</kind>
      <value>270.014068932</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>smiles</kind>
      <value>OC(=O)CCC(CC(O)=O)(C(O)=O)P(O)(O)=O</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formula</kind>
      <value>C7H11O9P</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchi</kind>
      <value>InChI=1S/C7H11O9P/c8-4(9)1-2-7(6(12)13,3-5(10)11)17(14,15)16/h1-3H2,(H,8,9)(H,10,11)(H,12,13)(H2,14,15,16)</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>inchikey</kind>
      <value>SZHQPBJEOCHCKM-UHFFFAOYSA-N</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polar_surface_area</kind>
      <value>169.43</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>refractivity</kind>
      <value>49.67</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>polarizability</kind>
      <value>20.86</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>rotatable_bond_count</kind>
      <value>7</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>acceptor_count</kind>
      <value>9</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>donor_count</kind>
      <value>5</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>physiological_charge</kind>
      <value>-4</value>
      <source>ChemAxon</source>
    </property>
    <property>
      <kind>formal_charge</kind>
      <value>0</value>
      <source>ChemAxon</source>
    </property>
  </predicted_properties>
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  <symptoms/>
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  <hmdb_id/>
  <pubchem_compound_id>61973</pubchem_compound_id>
  <chembl_id/>
  <chemspider_id>55824</chemspider_id>
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</compound>
