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Record Information
Created at2023-10-19 00:00:26 UTC
Updated at2023-10-19 00:00:50 UTC
NP-MRD IDNP0332008
Secondary Accession NumbersNone
Natural Product Identification
Common NameAminosalicylic Acid
DescriptionAminosalicylic Acid, also known as 4-aminosalicylate or paser, belongs to the class of organic compounds known as aminosalicylic acids. These are salicylic acids carrying an amino group on the benzene ring. An aminobenzoic acid that is salicylic acid substituted by an amino group at position 4. Aminosalicylic Acid is a drug which is used for the treatment of tuberculosis. It was first documented in 1959 (PMID: 14408481). Aminosalicylic Acid is a moderately basic compound (based on its pKa) (PMID: 13790963) (PMID: 14670340) (PMID: 8444944) (PMID: 5755895) (PMID: 13684569) (PMID: 5560983).
2-HYDROXY-4-aminobenzoIC ACIDChEBI
p-Aminosalicylic acidChEBI
Para-amino salicylic acidChEBI
4-Aminosalicylic acidKegg
Para-amino salicylateGenerator
Aminosalicylate sodiumHMDB
Para-aminosalicylic acidHMDB
4 Aminosalicylic acidHMDB
p-Aminosalicylic acid monolithium saltHMDB
p-Aminosalicylic acid, monosodium salt, dihydrateHMDB
Acid, aminosalicylicHMDB
Alumino 4 aminosalicylic acidHMDB
p Aminosalicylic acid monolithium saltHMDB
p-Aminosalicylic acid monopotassium saltHMDB
p Aminosalicylic acidHMDB
p Aminosalicylic acid monopotassium saltHMDB
p Aminosalicylic acid monosodium saltHMDB
p-Aminosalicylic acid, aluminum (2:1) saltHMDB
Para aminosalicylic acidHMDB
Alumino-4-aminosalicylic acidHMDB
p-Aminosalicylic acid monosodium saltHMDB
p-Aminosalicylic acid, calcium (2:1) saltHMDB
Aminosalicylic acidChEBI
Chemical FormulaC7H7NO3
Average Mass153.1354 Da
Monoisotopic Mass153.04259 Da
IUPAC Name4-amino-2-hydroxybenzoic acid
Traditional Nameaminosalicylic acid
CAS Registry NumberNot Available
InChI Identifier
Experimental Spectra
Spectrum TypeDescriptionDepositor IDDepositor OrganizationDepositorDeposition DateView
1D NMR1H NMR Spectrum (1D, 600 MHz, CD3OD, experimental)BgnzkNot AvailableNot Available2023-10-19View Spectrum
1D NMR13C NMR Spectrum (1D, 201 MHz, CD3OD, experimental)BgnzkNot AvailableNot Available2023-10-19View Spectrum
COSY NMR[1H, 1H] NMR Spectrum (2D, 600 MHz, CD3OD, experimental)BgnzkNot AvailableNot Available2023-10-19View Spectrum
HMBC NMR[1H, 13C] NMR Spectrum (2D, 600 MHz, CD3OD, experimental)BgnzkNot AvailableNot Available2023-10-19View Spectrum
HSQC NMR[1H, 13C] NMR Spectrum (2D, 600 MHz, CD3OD, experimental)BgnzkNot AvailableNot Available2023-10-19View Spectrum
Predicted Spectra
Not Available
Chemical Shift Submissions
Not Available
Species of OriginNot Available
Chemical Taxonomy
Description Belongs to the class of organic compounds known as aminosalicylic acids. These are salicylic acids carrying an amino group on the benzene ring.
KingdomOrganic compounds
Super ClassBenzenoids
ClassBenzene and substituted derivatives
Sub ClassBenzoic acids and derivatives
Direct ParentAminosalicylic acids
Alternative Parents
  • 4-aminosalicylic acid
  • Aminosalicylic acid
  • Salicylic acid
  • Aminobenzoic acid or derivatives
  • Aminobenzoic acid
  • Benzoic acid
  • Aniline or substituted anilines
  • M-aminophenol
  • Aminophenol
  • Benzoyl
  • 1-hydroxy-2-unsubstituted benzenoid
  • 1-hydroxy-4-unsubstituted benzenoid
  • Phenol
  • Vinylogous acid
  • Amino acid
  • Amino acid or derivatives
  • Carboxylic acid derivative
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Organic nitrogen compound
  • Organonitrogen compound
  • Organooxygen compound
  • Primary amine
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organic oxygen compound
  • Amine
  • Aromatic homomonocyclic compound
Molecular FrameworkAromatic homomonocyclic compounds
External Descriptors
Physical Properties
StateNot Available
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
pKa (Strongest Acidic)3.68ChemAxon
pKa (Strongest Basic)2.19ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area83.55 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity40 m³·mol⁻¹ChemAxon
Polarizability14.29 ųChemAxon
Number of Rings1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
DrugBank IDDB00233
Phenol Explorer Compound IDNot Available
FoodDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID4488
KEGG Compound IDC02518
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkAminosalicylic_Acid
METLIN IDNot Available
PubChem Compound4649
ChEBI ID27565
Good Scents IDNot Available
General References
  1. JUHASZ P, GALAMBOS G: [A simple paper-indicator method for the demonstration of paraaminosalicylic acid (PAS) in urine]. Tuberkulozis. 1961 Jun;14:186-7. [PubMed:13790963 ]
  2. Iyawoo K: Tuberculosis in Malaysia: problems and prospect of treatment and control. Tuberculosis (Edinb). 2004;84(1-2):4-7. doi: 10.1016/ [PubMed:14670340 ]
  3. Authors unspecified: Controlled trial of short-course regimens of chemotherapy in the ambulatory treatment of spinal tuberculosis. Results at three years of a study in Korea. Twelfth report of the Medical Research Council Working Party on Tuberculosis of the Spine. J Bone Joint Surg Br. 1993 Mar;75(2):240-8. doi: 10.1302/0301-620X.75B2.8444944. [PubMed:8444944 ]
  4. Tiitinen H, Mattila MJ: Modification of the serum isoniazid levels by different preparations of paraaminosalicylic acid. Arzneimittelforschung. 1968 May;18(5):623-5. [PubMed:5755895 ]
  5. ARTIS RD, JOHNSON PK, FREE AH: A simplified test for the detection of paraaminosalicylic acid and acetylsalicylic acid metabolites in urine. Am Rev Respir Dis. 1961 Sep;84:435-9. doi: 10.1164/arrd.1961.84.3.435. [PubMed:13684569 ]
  6. Ojo OA, Onifade A, Akande EO, Bannerman RH: The pattern of female genital tuberculosis in Ibadan. Isr J Med Sci. 1971 Feb;7(2):280-7. [PubMed:5560983 ]
  7. Shah A, Panjabi C, Maurya V, Khanna P: Multidrug resistant miliary tuberculosis and Pott's disease in an immunocompetent patient. Saudi Med J. 2004 Oct;25(10):1468-70. [PubMed:15494824 ]
  8. NAITO M: [Combined therapy of massive doses of isoniazid, pyrazinamide, and sulfisoxazole for patients with pulmonary tuberculosis resistant to streptomycin, paraaminosalicylic acid, and isoniazid]. Kyoto Daigaku Kekkaku Kenkyusho Kiyo. 1961 Mar;9:136-41. [PubMed:14478036 ]
  9. KENDIG EL Jr, HUDGENS RO: The effect of rubeola on tuberculosis under antimicrobial therapy. II. Tuberculous meningitis treated with isoniazid, streptomycin and paraaminosalicylic acid. Pediatrics. 1959 Oct;24:619-22. [PubMed:14408481 ]
  10. Joshi JV, Joshi UM, Sankolli GM, Gupta K, Rao AP, Hazari K, Sheth UK, Saxena BN: A study of interaction of a low-dose combination oral contraceptive with anti-tubercular drugs. Contraception. 1980 Jun;21(6):617-29. doi: 10.1016/0010-7824(80)90034-7. [PubMed:7428368 ]
  11. MITROIU O, POPA M, NEGREANU W, BILCU M, POPPER M, KAUFMANN S, NICULESCU V, VANCOV Z: [The differential diagnosis of jaundices appearing during treatment with paraaminosalicylic acid (PAS) by means of serum aldolase determination]. Stud Cercet Inframicrobiol. 1960;11:125-31. [PubMed:14423031 ]
  12. MILLER FF, GREEN RA: Loeffler's syndrome due to paraaminosalicylic acid. Dis Chest. 1962 Jul;42:100-3. doi: 10.1378/chest.42.1.100. [PubMed:14473996 ]
  13. Miroshnichenko II, Sokolova GB, Mokhireva LV: [Clinical pharmacokinetics of para-aminosalicylic acid tablets]. Antibiot Khimioter. 2009;54(1-2):20-4. [PubMed:19499713 ]
  14. SCHMITTOVA M, ENGELBERTH O, SRAMKOVA J: [Effect of aminopyrine, paraaminobenzoic acid and paraaminosalicylic acid on experimental carditis in mice]. Cas Lek Cesk. 1959 Oct 30;98:1365-9. [PubMed:14443158 ]
  15. Wong SC, Ali MA: Hemoglobin E diseases: hematological, analytical, and biosynthetic studies in homozygotes and double heterozygotes for alpha-thalassemia. Am J Hematol. 1982 Aug;13(1):15-21. doi: 10.1002/ajh.2830130104. [PubMed:7137163 ]