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Substance Name: Aminobenzoic acid [USP]
RN: 150-13-0
UNII: TL2TJE8QTX
InChIKey: ALYNCZNDIQEVRV-UHFFFAOYSA-N

Note

  • An aminobenzoic acid isomer that combines with pteridine and GLUTAMIC ACID to form FOLIC ACID. The fact that 4-aminobenzoic acid absorbs light throughout the UVB range has also resulted in its use as an ingredient in SUNSCREENS.

Molecular Formula

  • C7-H7-N-O2

Molecular Weight

  • 137.1373
 

Classification Codes

Classification Codes

  • Mutation Data
  • Reproductive Effect
  • Tumor Data
  • Ultraviolet Screen

Superlist Classification Code

  • Overall Carcinogenic Evaluation: Group 3

Names and Synonyms

Name of Substance

  • 4-Aminobenzoic acid
  • Aminobenzoic acid [USP]
  • Benzoic acid, 4-amino-
  • p-Aminobenzoic acid
  • PABA

MeSH Heading

  • 4-Aminobenzoic acid

Synonyms

  • 1-Amino-4-carboxybenzene
  • 4-27-00-07875 (Beilstein Handbook Reference)
  • 4-Aminobenzoic acid
  • 4-Carboxyaniline
  • Acido p-aminobenzoico
  • Acido p-aminobenzoico [Italian]
  • Acidum paraminobenzoicum
  • AI3-02436
  • Amben
  • Aminobenzoic acid
  • Anti-chromotrichia factor
  • Anticanitic vitamin
  • Bacterial vitamin H1
  • Benzoic acid, 4-amino
  • Benzoic acid, 4-amino-
  • Benzoic acid, p-amino-
  • BRN 0471605
  • Caswell No. 033B
  • CCRIS 6209
  • Chromotrichia factor
  • EC 205-753-0
  • EINECS 205-753-0
  • EPA Pesticide Chemical Code 233300
  • Hachemina
  • HSDB 6840
  • Kyselina p-aminobenzoova
  • Kyselina p-aminobenzoova [Czech]
  • NSC 7627
  • p-Aminobenzoic acid
  • p-Carboxyaniline
  • p-Carboxyphenylamine
  • PAB
  • PABA
  • Pabacyd
  • Pabafilm
  • Pabamine
  • Papacidum
  • para-Aminobenzoic acid
  • Paraminol
  • Paranate
  • Potaba
  • Romavit
  • Rvpaba
  • RVPaba Lipstick
  • Sunbrella
  • Super Shade by Coppertone
  • Trichochromogenic factor
  • UNII-TL2TJE8QTX
  • Vitamin BX
  • Vitamin H'

Systematic Names

  • 4-Aminobenzoic acid
  • Benzoic acid, 4-amino-
  • Benzoic acid, p-amino-
  • p-Aminobenzoic acid

Superlist Names

  • 4-Aminobenzoic acid
  • p-Aminobenzoic acid

Registry Numbers

CAS Registry Number

  • 150-13-0

FDA UNII

  • TL2TJE8QTX

Other Registry Number

  • 8014-65-1

System Generated Number

  • 0000150130

Structure Descriptors

InChI

1S/C7H7NO2/c8-6-3-1-5(2-4-6)7(9)10/h1-4H,8H2,(H,9,10)

InChIKey

ALYNCZNDIQEVRV-UHFFFAOYSA-N

Smiles

c1cc(ccc1C(=O)O)N

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LD50 oral 1gm/kg (1000mg/kg)   Proceedings of the Society for Experimental Biology and Medicine. Vol. 49, Pg. 184, 1942.
mouse LD50 oral 2850mg/kg (2850mg/kg) BEHAVIORAL: MUSCLE WEAKNESS

BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)
Proceedings of the Society for Experimental Biology and Medicine. Vol. 49, Pg. 184, 1942.
rabbit LD50 intravenous 2gm/kg (2000mg/kg)   Federation Proceedings, Federation of American Societies for Experimental Biology. Vol. 1, Pg. 71, 1942.
rabbit LD50 oral 1830mg/kg (1830mg/kg)   Federation Proceedings, Federation of American Societies for Experimental Biology. Vol. 10, Pg. 289, 1951.
rat LD50 intraperitoneal > 3450mg/kg (3450mg/kg)   Bollettino Chimico Farmaceutico. Vol. 112, Pg. 53, 1973.
rat LD50 oral > 6gm/kg (6000mg/kg)   Proceedings of the Society for Experimental Biology and Medicine. Vol. 49, Pg. 184, 1942.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 188.5 deg C   EXP
pKa Dissociation Constant 2.38 (none) 25 EXP
log P (octanol-water) 0.83 (none)   EXP
Water Solubility 6110 mg/L 30 EXP
Vapor Pressure 2.78E-04 mm Hg 25 EST
Henry's Law Constant 3.83E-11 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 4.04E-11 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.