The Disperse Orange 31 is an organic compound with the formula C₁₉H₁₉N₅O₄. The IUPAC name of this chemical is 2-[N-(2-cyanoethyl)-4-[(4-nitrophenyl)diazenyl]anilino]ethyl acetate. With the CAS registry number 68391-42-4, it is also named as 3-((2-(Acetyloxy)ethyl)(4-((4-nitrophenyl)azo)phenyl)amino)propiononitrile.

Physical properties about Disperse Orange 31 are: (1)ACD/LogP: 4.11; (2)ACD/LogD (pH 5.5): 4.11; (3)ACD/LogD (pH 7.4): 4.11; (4)ACD/BCF (pH 5.5): 778.54; (5)ACD/BCF (pH 7.4): 778.62; (6)ACD/KOC (pH 5.5): 4084.75; (7)ACD/KOC (pH 7.4): 4085.19; (8)#H bond acceptors: 9; (9)#Freely Rotating Bonds: 10; (10)Polar Surface Area: 123.87 Å²; (11)Index of Refraction: 1.598; (12)Molar Refractivity: 104.7 cm³; (13)Molar Volume: 306.5 cm³; (14)Polarizability: 41.5×10^-24cm³; (15)Surface Tension: 51.6 dyne/cm; (16)Density: 1.24 g/cm³; (17)Flash Point: 316.4 °C; (18)Enthalpy of Vaporization: 89.27 kJ/mol; (19)Boiling Point: 599.6 °C at 760 mmHg; (20)Vapour Pressure: 2.45E-14 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES: [O-][N+](=O)c2ccc(/N=N/c1ccc(N(CCOC(=O)C)CCC#N)cc1)cc2
(2)InChI: InChI=1/C19H19N5O4/c1-15(25)28-14-13-23(12-2-11-20)18-7-3-16(4-8-18)21-22-17-5-9-19(10-6-17)24(26)27/h3-10H,2,12-14H2,1H3/b22-21+
(3)InChIKey: QLRDACXDRLGLOC-QURGRASLBD
(4)Std. InChI: InChI=1S/C19H19N5O4/c1-15(25)28-14-13-23(12-2-11-20)18-7-3-16(4-8-18)21-22-17-5-9-19(10-6-17)24(26)27/h3-10H,2,12-14H2,1H3/b22-21+
(5)Std. InChIKey: QLRDACXDRLGLOC-QURGRASLSA-N