EPA Genetic Toxicology Program. Reported in EPA TSCA Inventory.

The Oil Yellow DEA is an organic compound with the formula C₁₆H₁₉N₃. The IUPAC name of this chemical is N,N-diethyl-4-phenyldiazenylaniline. With the CAS registry number 2481-94-9, it is also named as C.I. Solvent Yellow 56; 4-(Diethylamino)azobenzene. The product's categories are dyes and pigments; organics; solvent dyestuff. It is reddish yellow powder.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 5.49; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.34; (4)ACD/LogD (pH 7.4): 5.49; (5)ACD/BCF (pH 5.5): 6207.46; (6)ACD/BCF (pH 7.4): 8740.21; (7)ACD/KOC (pH 5.5): 16356.07; (8)ACD/KOC (pH 7.4): 23029.61; (9)#H bond acceptors: 3; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 5; (12)Index of Refraction: 1.555; (13)Molar Refractivity: 80.88 cm³; (14)Molar Volume: 251.6 cm³; (15)Polarizability: 32.06×10^-24 cm³; (16)Surface Tension: 37.1 dyne/cm; (17)Enthalpy of Vaporization: 64.77 kJ/mol; (18)Vapour Pressure: 1.61E-06 mmHg at 25°C; (19)Rotatable Bond Count: 5; (20)Exact Mass: 253.157898; (21)MonoIsotopic Mass: 253.157898; (22)Topological Polar Surface Area: 28; (23)Heavy Atom Count: 19.

Preparation of Oil Yellow DEA: It can be obtained by N,N-diethyl-4-(phenyl-ONN-azoxy)aniline with solvent benzene at 17 °C and irradiation. This reaction which needs 5 hours can get another product diethyl-[4-(N-phenyl-ONN-azoxy)-phenyl]-amine. The yield is 10%.

Uses of Oil Yellow DEA: It is mainly used for puree coloring of polyester fiber. And it can react with peroxybenzoic acid to get N,N-diethyl-4-phenylazoaniline N-oxide. This reaction needs solvent CHCl₃ at ambient temperature. The reaction time is 30 hours. The yield is 32%.

When you are using this chemical, please be cautious about it as the following:
It is harmful by inhalation, in contact with skin and if swallowed. And it is irritating to eyes, respiratory system and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing, gloves and eye/face protection.

People can use the following data to convert to the molecule structure. 
1. SMILES: N(=N/c1ccc(N(CC)CC)cc1)\c2ccccc2;
2. InChI: InChI=1/C16H19N3/c1-3-19(4-2)16-12-10-15(11-13-16)18-17-14-8-6-5-7-9-14/h5-13H,3-4H2,1-2H3/b18-17+.