4-Aminobenzoic acid
Compounds
4-Aminobenzoic acid is an organic compound with the formula H₂NC₆H₄CO₂H. PABA is a white solid, although commercial samples can appear gray. It is slightly soluble in water. It consists of a benzene ring substituted with amino and carboxyl groups.... Wikipedia
IUPAC ID: 4-Aminobenzoic acid
Formula: C7H7NO2
Molar mass: 137.14 g/mol
Melting point: 368.6°F (187°C)
3D model (JSmol): Interactive image
Acidity (pKa): : 2.42 (amino; H2O); 4.88 (carboxyl; H2O);
Appearance: White-grey crystals