IUPAC Name: 1H-Indol-4-amine
Molecular Formula: C₈H₈N₂
Molecular Weight: 132.16 g/mol
SMILES: c1cc(c2cc[nH]c2c1)N
InChI: InChI=1/C8H8N2/c9-7-2-1-3-8-6(7)4-5-10-8/h1-5,10H,9H2
Product Categories: Indoles and derivatives; Amines; Pyrroles & Indoles; Indole; Indoles; Pyrroles & Indoles
Melting Point: 106-109 °C(lit.)
Storage temperature: -20 °C
Water Solubility: Insoluble
Sensitive: Air Sensitive
Index of Refraction: 1.757 
Molar Refractivity: 42.76 cm³ 
Molar Volume: 104.1 cm³ 
Polarizability: 16.95×10^-24 cm³ 
Surface Tension: 65.7 dyne/cm 
Density: 1.268 g/cm³ 
Flash Point: 195 °C 
Enthalpy of Vaporization: 59.89 kJ/mol 
Boiling Point: 354 °C at 760 mmHg 
Vapour Pressure of 4-Aminoindole (CAS NO.5192-23-4): 3.46E-05 mmHg at 25 °C

 4-Aminoindole (CAS NO.5192-23-4) is used in organic synthesis.

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-24/25 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S24/25:Avoid contact with skin and eyes.
WGK Germany: 3
F: 8-10-34
HazardClass of 4-Aminoindole (CAS NO.5192-23-4): AIR SENSITIVE, IRRITANT-HARMFUL, KEEP COLD

 4-Aminoindole (CAS NO.5192-23-4), its Synonyms are 4-Amino Indole ; 4-Amino-1H-indole ; 4-Indolamine ; 5-methoxyl indole-carboxaldehyde ; 4-Cyanoindole . It is greenish-grey to tan powder.