The 3-Amino-4-ethylpyrazole, with CAS registry number 43024-15-3, has the systematic name of 4-ethyl-1H-pyrazol-5-amine. And it is also named 1H-Pyrazol-3-amine, 4-ethyl-.

Physical properties about this chemical are: (1)ACD/LogP: 0.29; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1; (4)ACD/LogD (pH 7.4): 0; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 20; (8)ACD/KOC (pH 7.4): 25; (9)#H bond acceptors: 3; (10)#H bond donors: 3; (11)#Freely Rotating Bonds: 2; (12)Polar Surface Area: 54.7 Å²; (13)Index of Refraction: 1.593; (14)Molar Refractivity: 32.563 cm³; (15)Molar Volume: 96.077 cm³; (16)Polarizability: 12.909×10^-24cm³; (17)Surface Tension: 56.539 dyne/cm; (18)Enthalpy of Vaporization: 54.78 kJ/mol; (19)Vapour Pressure: 0.001 mmHg at 25°C.

You can still convert the following datas into molecular structure: 
(1)SMILES: n1cc(c(N)n1)CC
(2)InChI: InChI=1/C5H9N3/c1-2-4-3-7-8-5(4)6/h3H,2H2,1H3,(H3,6,7,8)
(3)InChIKey: RDCODVKTTJWFAR-UHFFFAOYAG
(4)Std. InChI: InChI=1S/C5H9N3/c1-2-4-3-7-8-5(4)6/h3H,2H2,1H3,(H3,6,7,8)
(5)Std. InChIKey: RDCODVKTTJWFAR-UHFFFAOYSA-N