You are using an unsupported browser. Please upgrade your browser to a newer version to get the best experience on Human Metabolome Database.
Record Information
Version4.0
StatusDetected and Quantified
Creation Date2005-11-16 15:48:42 UTC
Update Date2020-04-29 21:30:08 UTC
HMDB IDHMDB0001392
Secondary Accession Numbers
  • HMDB01392
Metabolite Identification
Common Namep-Aminobenzoic acid
Descriptionp-Aminobenzoic acid, also known as 4-aminobenzoic acid or PABA, is an organic compound with molecular formula C7H7NO2. PABA is a white crystalline substance that is only slightly soluble in water. It consists of a benzene ring substituted with an amino group and a carboxylic acid. PABA is an essential nutrient for some bacteria and is sometimes called vitamin Bx. However, PABA is not essential for humans and it varies in its activity from other B vitamins. PABA is sometimes marketed as an essential nutrient under the premise that it can stimulate intestinal bacteria. Certain bacteria in the human intestinal tract such as E. coli generate PABA from chorismate. Humans lack the enzymes to convert PABA into folate, and therefore require folate from dietary sources such as green leafy vegetables. Although some intestinal bacteria can synthesize folate from PABA and some E. coli can synthesize folate this requires six enzymatic activities in folate synthesis which are not all done in the same bacteria. PABA used to be a common sunscreen agent until it was found to also be a sensitizer. The potassium salt of PABA is used therapeutically in fibrotic skin disorders. PABA can also be found in Acetobacter (DOI: 10.3181/00379727-52-14147).
Structure
Data?1588195808
Synonyms
ValueSource
1-Amino-4-carboxybenzeneChEBI
4-Amino-benzoic acidChEBI
4-AminobenzoesaeureChEBI
4-CarboxyanilineChEBI
4-CarboxyphenylamineChEBI
ABEEChEBI
gamma-Aminobenzoic acidChEBI
p-AminobenzoesaeureChEBI
p-CarboxyanilineChEBI
p-CarboxyphenylamineChEBI
PABAChEBI
Para-aminobenzoic acidChEBI
4-Aminobenzoic acidKegg
p-AminobenzoateKegg
RVPaba lipstickKegg
4-Amino-benzoateGenerator
g-AminobenzoateGenerator
g-Aminobenzoic acidGenerator
gamma-AminobenzoateGenerator
Γ-aminobenzoateGenerator
Γ-aminobenzoic acidGenerator
Para-aminobenzoateGenerator
4-AminobenzoateGenerator
Acido p-aminobenzoicoHMDB
Acidum paraminobenzoicumHMDB
ActipolHMDB
AmbenHMDB
AminobenzoateHMDB
Aminobenzoic acidHMDB
Aniline-4-carboxylateHMDB
Aniline-4-carboxylic acidHMDB
Anti-chromotrichia factorHMDB
Anticanitic vitaminHMDB
Anticantic vitaminHMDB
Antichromotrichia factorHMDB
Bacterial vitamin H1HMDB
Chromotrichia factorHMDB
HacheminaHMDB
Kyselina p-aminobenzoovaHMDB
p-Amino-benzoateHMDB
p-Amino-benzoic acidHMDB
PABHMDB
PabacydHMDB
PabafilmHMDB
PabagelHMDB
PabamineHMDB
PabanolHMDB
PapacidumHMDB
ParaminolHMDB
ParanateHMDB
PotabaHMDB
RomavitHMDB
RvpabaHMDB
SunbrellaHMDB
Super shade by coppertoneHMDB
Trichochromogenic factorHMDB
Trochromogenic factorHMDB
Vitamin BXHMDB
Vitamin h'HMDB
4 Aminobenzoic acidHMDB
4 Aminobenzoic acid, potassium saltHMDB
EpitelplastHMDB
Jumer brand OF aminobenzoic acidHMDB
Medea brand OF aminobenzoic acidHMDB
ParaminanHMDB
4-Aminobenzoate, potassiumHMDB
Epit vitHMDB
Llorens brand OF aminobenzoic acidHMDB
PabasanHMDB
Potassium aminobenzoateHMDB
4-Aminobenzoic acid, potassium saltHMDB
Aminobenzoate, potassiumHMDB
Glenwood brand OF potassium aminobezoateHMDB
Llorens brand OF aminobenzoic acid sodium saltHMDB
Magnesium para-aminobenzoateHMDB
Potassium 4 aminobenzoateHMDB
Potassium 4-aminobenzoateHMDB
p Aminobenzoic acidHMDB
Para aminobenzoic acidHMDB
Para-aminobenzoate, magnesiumHMDB
p-Aminobenzoic acidChEBI
Chemical FormulaC7H7NO2
Average Molecular Weight137.136
Monoisotopic Molecular Weight137.047678473
IUPAC Name4-aminobenzoic acid
Traditional Namesunbrella
CAS Registry Number150-13-0
SMILES
NC1=CC=C(C=C1)C(O)=O
InChI Identifier
InChI=1S/C7H7NO2/c8-6-3-1-5(2-4-6)7(9)10/h1-4H,8H2,(H,9,10)
InChI KeyALYNCZNDIQEVRV-UHFFFAOYSA-N
Chemical Taxonomy
Description belongs to the class of organic compounds known as aminobenzoic acids. These are benzoic acids containing an amine group attached to the benzene moiety.
KingdomOrganic compounds
Super ClassBenzenoids
ClassBenzene and substituted derivatives
Sub ClassBenzoic acids and derivatives
Direct ParentAminobenzoic acids
Alternative Parents
Substituents
  • Aminobenzoic acid
  • Benzoic acid
  • Benzoyl
  • Aniline or substituted anilines
  • Amino acid or derivatives
  • Amino acid
  • Carboxylic acid derivative
  • Carboxylic acid
  • Monocarboxylic acid or derivatives
  • Amine
  • Organonitrogen compound
  • Organooxygen compound
  • Primary amine
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organic oxygen compound
  • Organic nitrogen compound
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External Descriptors
Ontology
Disposition

Route of exposure:

Source:

Biological location:

Role

Industrial application:

Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point188.5 °CNot Available
Boiling PointNot AvailableNot Available
Water Solubility6.11 mg/mLNot Available
LogP0.83HANSCH,C ET AL. (1995)
Predicted Properties
PropertyValueSource
Water Solubility4.41 g/LALOGPS
logP0.78ALOGPS
logP0.8ChemAxon
logS-1.5ALOGPS
pKa (Strongest Acidic)4.77ChemAxon
pKa (Strongest Basic)2.69ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area63.32 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity38.01 m³·mol⁻¹ChemAxon
Polarizability13.44 ųChemAxon
Number of Rings1ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectra
Spectrum TypeDescriptionSplash KeyView
GC-MSGC-MS Spectrum - GC-EI-TOF (Pegasus III TOF-MS system, Leco; GC 6890, Agilent Technologies) (Non-derivatized)splash10-00yl-1960000000-b22b04854c131470802aSpectrum
GC-MSGC-MS Spectrum - GC-MS (1 TMS)splash10-0fkc-2900000000-dec9b6851633ff2c426cSpectrum
GC-MSGC-MS Spectrum - GC-MS (2 TMS)splash10-00yl-2890000000-b299bfaaed61286c2ff6Spectrum
GC-MSGC-MS Spectrum - EI-B (Non-derivatized)splash10-0079-9600000000-075c262f1e5d23ef097dSpectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-00yl-1960000000-b22b04854c131470802aSpectrum
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-0fkc-2900000000-dec9b6851633ff2c426cSpectrum
GC-MSGC-MS Spectrum - GC-MS (Non-derivatized)splash10-00yl-2890000000-b299bfaaed61286c2ff6Spectrum
GC-MSGC-MS Spectrum - GC-EI-TOF (Non-derivatized)splash10-00yl-1960000000-4d7d9e3e3a7a741c72caSpectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-00kr-5900000000-8244277f60fc465369b8Spectrum
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (1 TMS) - 70eV, Positivesplash10-006x-4900000000-299c72af4aa4008292bcSpectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-00ku-4900000000-ab0d2860a4f23e4fcad4Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-00mo-9100000000-667a53f89529678400c7Spectrum
LC-MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-014i-9000000000-0bbc34587525655f98efSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Negativesplash10-000i-0900000000-8f6c193895f5adf391beSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Negativesplash10-0006-9200000000-78f63538a3011f036551Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Negativesplash10-0006-9000000000-521edb7d484c452d0da3Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Negativesplash10-0006-9000000000-7ae0035594587960bab7Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Negativesplash10-00kf-9000000000-35088605171b150e8b08Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 10V, Positivesplash10-00di-3900000000-d67f9d252f758529a83cSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 20V, Positivesplash10-00di-1900000000-e4d34d9516fe889137f6Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 30V, Positivesplash10-00di-6900000000-387d1a3c2d588c6f8552Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 40V, Positivesplash10-00r6-9200000000-9ef61d003f891b00406fSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ (API3000, Applied Biosystems) 50V, Positivesplash10-014i-9000000000-eaf693e5f0cde39a548eSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF (UPLC Q-Tof Premier, Waters) , Positivesplash10-000i-7900000000-225973eab49386396fa9Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-000i-0900000000-8f6c193895f5adf391beSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0006-9200000000-78f63538a3011f036551Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0006-9000000000-521edb7d484c452d0da3Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-0006-9000000000-7ae0035594587960bab7Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QQ , negativesplash10-00kf-9000000000-35088605171b150e8b08Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0079-0900000000-173f144fba431cca9164Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00di-1900000000-ab3524c5aadc6fdc28cbSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0006-9200000000-67cea679b40b94c39ac0Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-000i-3900000000-682d5d9d22372ece770bSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-000f-9600000000-8d4bba3f647000005bb0Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0006-9100000000-5d9b80bb0601c2f238c2Spectrum
MSMass Spectrum (Electron Ionization)splash10-00dr-8900000000-bface88b2e77a7dce6e1Spectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
1D NMR1H NMR SpectrumNot AvailableSpectrum
2D NMR[1H,1H] 2D NMR SpectrumNot AvailableSpectrum
2D NMR[1H,13C] 2D NMR SpectrumNot AvailableSpectrum
Biological Properties
Cellular LocationsNot Available
Biospecimen Locations
  • Blood
  • Feces
  • Urine
Tissue Locations
  • Epidermis
  • Fibroblasts
  • Intestine
  • Liver
  • Placenta
  • Prostate
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodDetected and Quantified15.0 (5.01-32.0) uMAdult (>18 years old)BothNormal details
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothNormal details
UrineDetected and Quantified0.11 umol/mmol creatinineAdult (>18 years old)BothNormal details
UrineDetected and Quantified0.36 (0.15-0.63) umol/mmol creatinineAdult (>18 years old)BothNormal
    • Geigy Scientific ...
    • West Cadwell, N.J...
    • Basel, Switzerlan...
details
Abnormal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothColorectal Cancer details
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)BothColorectal Cancer details
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)Both
Colorectal cancer
details
Associated Disorders and Diseases
Disease References
Colorectal cancer
  1. Goedert JJ, Sampson JN, Moore SC, Xiao Q, Xiong X, Hayes RB, Ahn J, Shi J, Sinha R: Fecal metabolomics: assay performance and association with colorectal cancer. Carcinogenesis. 2014 Sep;35(9):2089-96. doi: 10.1093/carcin/bgu131. Epub 2014 Jul 18. [PubMed:25037050 ]
  2. Brown DG, Rao S, Weir TL, O'Malia J, Bazan M, Brown RJ, Ryan EP: Metabolomics and metabolic pathway networks from human colorectal cancers, adjacent mucosa, and stool. Cancer Metab. 2016 Jun 6;4:11. doi: 10.1186/s40170-016-0151-y. eCollection 2016. [PubMed:27275383 ]
  3. Sinha R, Ahn J, Sampson JN, Shi J, Yu G, Xiong X, Hayes RB, Goedert JJ: Fecal Microbiota, Fecal Metabolome, and Colorectal Cancer Interrelations. PLoS One. 2016 Mar 25;11(3):e0152126. doi: 10.1371/journal.pone.0152126. eCollection 2016. [PubMed:27015276 ]
Associated OMIM IDs
DrugBank IDDB02362
Phenol Explorer Compound IDNot Available
FooDB IDFDB001037
KNApSAcK IDC00001401
Chemspider ID953
KEGG Compound IDC00568
BioCyc IDP-AMINO-BENZOATE
BiGG IDNot Available
Wikipedia Link4-Aminobenzoic_Acid
METLIN ID3261
PubChem Compound978
PDB IDNot Available
ChEBI ID30753
Food Biomarker OntologyNot Available
VMH ID4ABZ
MarkerDB ID
References
Synthesis ReferenceSato, Ryu; Kimura, Koichi; Takahashi, Akira. Preparation of p-aminobenzoic acid from styrene polymers. Jpn. Kokai Tokkyo Koho (2007), 13pp.
Material Safety Data Sheet (MSDS)Download (PDF)
General References
  1. Derewlany LO, Knie B, Koren G: Arylamine N-acetyltransferase activity of the human placenta. J Pharmacol Exp Ther. 1994 May;269(2):756-60. [PubMed:8182542 ]
  2. Laufer D, Cleghorn G, Forstner G, Ellis L, Koren G, Durie P: The bentiromide test using plasma p-aminobenzoic acid for diagnosing pancreatic insufficiency in young children. The effect of two different doses and a liquid meal. Gastroenterology. 1991 Jul;101(1):207-13. [PubMed:2044909 ]
  3. Nathan D, Sakr A, Lichtin JL, Bronaugh RL: In vitro skin absorption and metabolism of benzoic acid, p-aminobenzoic acid, and benzocaine in the hairless guinea pig. Pharm Res. 1990 Nov;7(11):1147-51. [PubMed:2293213 ]
  4. Lankisch PG, Brauneis J, Otto J, Goke B: Pancreolauryl and NBT-PABA tests. Are serum tests more practicable alternatives to urine tests in the diagnosis of exocrine pancreatic insufficiency? Gastroenterology. 1986 Feb;90(2):350-4. [PubMed:3484456 ]
  5. Szewczuk A, Wellman-Bednawska M: The use of gamma-glutamyl-p-aminobenzoic acid as the substrate for determination of gamma-glutamyltranspeptidase activity in blood serum. Clin Chim Acta. 1978 Mar 1;84(1-2):19-26. [PubMed:25149 ]
  6. Kiss Z, Wolfling J, Csati S, Nagy F, Lonovics J, Schneider G: [The ursodeoxycholic acid-p-aminobenzoic acid test in the diagnosis of small bowel bacterial overgrowth syndrome]. Orv Hetil. 1997 May 18;138(20):1255-8. [PubMed:9244859 ]
  7. Szewczuk A, Wellman-Bednawska M: Acyl derivatives of p-aminobenzoic acid as new substrates for the assay of serum acylase activity. Clin Chim Acta. 1978 Mar 1;84(1-2):27-31. [PubMed:305833 ]
  8. Derewlany LO, Knie B, Koren G: Human placental transfer and metabolism of p-aminobenzoic acid. J Pharmacol Exp Ther. 1994 May;269(2):761-5. [PubMed:8182543 ]
  9. Ito S, Maruta K, Imai Y, Kato T, Ito M, Nakajima S, Fujita K, Kurahashi T: Urinary p-aminobenzoic acid determined in the pancreatic function test by liquid chromatography, with electrochemical detection. Clin Chem. 1982 Feb;28(2):323-6. [PubMed:6976857 ]
  10. Durie PR, Yung-Jato LY, Soldin SJ, Verjee Z, Ellis L: Bentiromide test using liquid-chromatographic measurement of p-aminobenzoic acid and its metabolites for diagnosing pancreatic insufficiency in childhood. J Pediatr. 1992 Sep;121(3):413-6. [PubMed:1517919 ]