4-Aminopyridine CAS NO.:504-24-5 Other name:Avitrol; 4-Pyridinamine; 4-Pyridylamine; Amino-4-pyridine; gamma-Aminopyridine Appearance: White flake or colorless crystalline Content: 98% Water Content: 0.5% Calcination Residue: 0.2% Melting point: 158-161 °C