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Record Information
Creation Date2009-12-04 04:01:21 UTC
Update Date2014-12-24 20:26:17 UTC
Accession NumberT3D3657
Common NameDiundecyl phthalate
ClassSmall Molecule
DescriptionDiundecyl phthalate is a phthalate ester. Phthalate esters are esters of phthalic acid and are mainly used as plasticizers, primarily used to soften polyvinyl chloride. They are found in a number of products, including glues, building materials, personal care products, detergents and surfactants, packaging, children's toys, paints, pharmaceuticals, food products, and textiles. Phthalates are hazardous due to their ability to act as endocrine disruptors. They are being phased out of many products in the United States and European Union due to these health concerns. (4)
Compound Type
  • Aromatic Hydrocarbon
  • Cosmetic Toxin
  • Ester
  • Ether
  • Food Toxin
  • Household Toxin
  • Industrial/Workplace Toxin
  • Organic Compound
  • Phthalate
  • Plasticizer
  • Synthetic Compound
Chemical Structure
1,2-Benzenedicarboxylic acid, 1,2-diundecyl ester
Carboxylic ester
Di-n-undecyl phthalate
Diundecyl linear phthalate
Diundecyl phthalic acid
Chemical FormulaC30H50O4
Average Molecular Mass474.716 g/mol
Monoisotopic Mass474.371 g/mol
CAS Registry Number3648-20-2
IUPAC Name1,2-diundecyl benzene-1,2-dicarboxylate
Traditional Namediundecyl phthalate
InChI IdentifierInChI=1S/C30H50O4/c1-3-5-7-9-11-13-15-17-21-25-33-29(31)27-23-19-20-24-28(27)30(32)34-26-22-18-16-14-12-10-8-6-4-2/h19-20,23-24H,3-18,21-22,25-26H2,1-2H3
Chemical Taxonomy
Description belongs to the class of organic compounds known as benzoic acid esters. These are ester derivatives of benzoic acid.
KingdomOrganic compounds
Super ClassBenzenoids
ClassBenzene and substituted derivatives
Sub ClassBenzoic acids and derivatives
Direct ParentBenzoic acid esters
Alternative Parents
  • Benzoate ester
  • Benzoyl
  • Dicarboxylic acid or derivatives
  • Carboxylic acid ester
  • Carboxylic acid derivative
  • Organic oxygen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Organooxygen compound
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External DescriptorsNot Available
Biological Properties
StatusDetected and Not Quantified
Cellular Locations
  • Membrane
Biofluid LocationsNot Available
Tissue LocationsNot Available
PathwaysNot Available
ApplicationsNot Available
Biological RolesNot Available
Chemical RolesNot Available
Physical Properties
AppearanceColorless liquid.
Experimental Properties
Melting Point35.5°C
Boiling PointNot Available
Solubility0.00111 mg/mL at 20°C
LogPNot Available
Predicted Properties
Water Solubility1.7e-05 g/LALOGPS
pKa (Strongest Basic)-6.7ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count2ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area52.6 ŲChemAxon
Rotatable Bond Count24ChemAxon
Refractivity142.27 m³·mol⁻¹ChemAxon
Polarizability62.35 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-004i-0303900000-a42df83dac442293ebbfJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0a4i-4913200000-f8aae2d35744485654b7JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0a6r-6910000000-247cd6cb58b6ab16035fJSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-00di-0203900000-8950653e776efb387da4JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-01b9-0839300000-66f789e9cab63307d0d9JSpectraViewer
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0gka-0901000000-273be240663b0d180ec1JSpectraViewer
MSMass Spectrum (Electron Ionization)splash10-0002-7900000000-7d973f6b9a121570942dJSpectraViewer | MoNA
Toxicity Profile
Route of ExposureOral (4) ; inhalation (4) ; dermal (4)
Mechanism of ToxicityPhthalate esters are endocrine disruptors. They decrease foetal testis testosterone production and reduce the expression of steroidogenic genes by decreasing mRNA expression. Some phthalates have also been shown to reduce the expression of insulin-like peptide 3 (insl3), an important hormone secreted by the Leydig cell necessary for development of the gubernacular ligament. Animal studies have shown that these effects disrupt reproductive development and can cause a number of malformations in affected young. (1)
MetabolismPhthalate esters are first hydrolyzed to their monoester derivative. Once formed, the monoester derivative can be further hydrolyzed in vivo to phthalic acid or conjugated to glucuronide, both of which can then be excreted. The terminal or next-to-last carbon atom in the monoester can also be oxidized to an alcohol, which can be excreted as is or first oxidized to an aldehyde, ketone, or carboxylic acid. The monoester and oxidative metabolites are excreted in the urine and faeces. (2)
Toxicity ValuesLD50: >100 g/kg (Intraperitoneal, Mouse) (3) LD50: >7.9 g/kg (Dermal, Rabbit) (3) LC50: >1.8 mg/L (Inhalation, Rat) (3)
Lethal DoseNot Available
Carcinogenicity (IARC Classification)No indication of carcinogenicity to humans (not listed by IARC).
Uses/SourcesPhthalate esters are mainly used as plasticizers, primarily used to soften polyvinyl chloride. They are found in a number of products, including glues, building materials, personal care products, detergents and surfactants, packaging, children's toys, paints, pharmaceuticals, food products, and textiles. Phthalates are used in a variety of household applications such as shower curtains, vinyl upholstery, adhesives, floor tiles, food containers and wrappers, and cleaning materials. Personal care items containing phthalates include perfume, eye shadow, moisturizer, nail polish, liquid soap, and hair spray. (4)
Minimum Risk LevelNot Available
Health EffectsPhthalate esters are endocrine disruptors. Animal studies have shown that they disrupt reproductive development and can cause a number of malformations in affected young, such as reduced anogenital distance (AGD), cryptorchidism, hypospadias, and reduced fertility. The combination of effects associated with phthalates is called 'phthalate syndrome’. (1)
SymptomsPhthalate esters are endocrine disruptors and can cause a number of developmental malformations termed 'phthalate syndrome'. (1)
TreatmentNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
DrugBank IDNot Available
HMDB IDNot Available
PubChem Compound ID19283
ChemSpider ID18193
UniProt IDNot Available
ChEBI ID33308
CTD IDNot Available
Stitch IDNot Available
PDB IDNot Available
ACToR IDNot Available
Wikipedia LinkNot Available
Synthesis ReferenceNot Available
General References
  1. Wilson VS, Blystone CR, Hotchkiss AK, Rider CV, Gray LE Jr: Diverse mechanisms of anti-androgen action: impact on male rat reproductive tract development. Int J Androl. 2008 Apr;31(2):178-87. doi: 10.1111/j.1365-2605.2007.00861.x. [18315717 ]
  2. Wittassek M, Angerer J: Phthalates: metabolism and exposure. Int J Androl. 2008 Apr;31(2):131-8. Epub 2007 Dec 7. [18070048 ]
  3. Bingham, E, Cohrssen, B, and Powell, CH (2001). Patty's Toxicology Volumes 1-9. 5th ed. New York, N.Y: John Wiley & Sons.
  4. Wikipedia. Phthalate. Last Updated 22 November 2009. [Link]
Gene Regulation
Up-Regulated GenesNot Available
Down-Regulated GenesNot Available