The 4-Aminoimidazole with cas registry number of 4919-03-3, has the systematic name of 1H-imidazol-5-amine. And its IUPAC name is the same one. Besides this, it is also called 1H-Imidazol-4-amine. 

 Physical properties about this chemical are: (1)ACD/LogP: -1.62; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -3.77; (4)ACD/LogD (pH 7.4): -2.24; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 3; (10)#H bond donors: 3; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 21.06 Å²; (13)Index of Refraction: 1.647; (14)Molar Refractivity: 23.01 cm³; (15)Molar Volume: 63.2 cm³; (16)Polarizability: 9.12×10^-24cm³; (17)Surface Tension: 76.1 dyne/cm; (18)Enthalpy of Vaporization: 66.86 kJ/mol; (19)Vapour Pressure: 4.11E-07 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
(1)SMILES: n1cc(N)nc1
(2)InChI: InChI=1/C3H5N3/c4-3-1-5-2-6-3/h1-2H,4H2,(H,5,6)
(3)InChIKey: QRZMXADUXZADTF-UHFFFAOYAE
(4)Std. InChI: InChI=1S/C3H5N3/c4-3-1-5-2-6-3/h1-2H,4H2,(H,5,6)
(5)Std. InChIKey: QRZMXADUXZADTF-UHFFFAOYSA-N