Empirical Formula of N-Ethyl-4-aminoazobenzene (CAS NO.2058-67-5): C₁₄H₁₅N₃
Molecular Weight: 225.289 
Index of Refraction: 1.576
Density: 1.05 g/cm³
Flash Point: 185.1 °C
Enthalpy of Vaporization: 63.08 kJ/mol
Boiling Point: 382.4 °C at 760 mmHg
Vapour Pressure: 4.73E-06 mmHg at 25 °C
Structure of N-Ethyl-4-aminoazobenzene (CAS NO.2058-67-5):
                         
IUPAC Name: N-Ethyl-4-phenyldiazenylaniline
Canonical SMILES: CCNC1=CC=C(C=C1)N=NC2=CC=CC=C2
InChI: InChI=1S/C14H15N3/c1-2-15-12-8-10-14(11-9-12)17-16-13-6-4-3-5-7-13/h3-11,15H,2H2,1H3
InChIKey: OCWXDBMTBDGKKE-UHFFFAOYSA-N

Experimental teratogenic and reproductive effects. Questionable carcinogen with experimental tumorigenic data. When heated to decomposition N-Ethyl-4-aminoazobenzene (CAS NO.2058-67-5) emits toxic fumes of NO_x.

 N-Ethyl-4-aminoazobenzene , its cas register number is 2058-67-5. It also can be called N-Ethyl-p-(phenylazo)aniline ; Benzenamine, N-ethyl-4-(phenylazo)- ; N-Ethyl-4-(phenylazo)benzenamine ; and 4-(Ethylaminoazobenzene) .