The Acid Yellow 220 is an organic compound with the formula C₄₆H₃₂Cl₂CoN₈Na₄O₁₄S_2. The EINECS number is 274-929-7, and its IUPAC name of this chemical is tetrasodium; 2-[[3-[(2Z)-2-[1-(2-chlorophenyl)imino-1-oxido-3-oxobutan-2-ylidene]hydrazinyl]-4-oxidophenyl]sulfonylamino]benzoate; cobalt(2+). With the CAS registry number 70851-34-2, it is also named as Tetrasodium bis(2-(((3-((1-((2-chloroanilino)carbonyl)-2-oxopropyl)azo)-4-hydroxyphenyl)sulphonyl)amino)benzoato(3-))cobaltate(4-).

Physical properties about this chemical are: S29:Do not empty into drains. (1)ACD/LogP:  4.62; (2)# of Rule of 5 Violations:  3; (3)#H bond acceptors:  11; (4)#H bond donors:  5; (5)#Freely Rotating Bonds:  9; (6)Flash Point:  417.6 °C; (7)Enthalpy of Vaporization:  117.15 kJ/mol; (8)Boiling Point:  766.9 °C at 760 mmHg; (9) Vapour Pressure:  9.86E-25 mmHg at 25°C.

Additionally, you could obtain the molecular structure by converting the following datas: 
(1) Canonical SMILES: CC(=O)C(=NNC1=C(C=CC(=C1)S(=O)(=O)NC2=CC=CC=C2C(=O)[O-])[O-])C(=NC3=CC=
(2)CC=C3Cl)[O-].CC(=O)C(=NNC1=C(C=CC(=C1)S(=O)(=O)NC2=CC=CC=C2C(=O)[O-])[O-])C(=NC3=CC=CC=C3Cl)[O-].[Na+].[Na+].[Na+].[Na+].[Co+2]
(3)Isomeric SMILES: CC(=O)/C(=N\NC1=C(C=CC(=C1)S(=O)(=O)NC2=CC=CC=C2C(=O)[O-])[O-])/C(=NC3=CC=CC=C3Cl)[O-].CC(=O)/C(=N\NC1=C(C=CC(=C1)S(=O)(=O)NC2=CC=CC=C2C(=O)[O-])[O-])/C(=NC3=CC=CC=C3Cl)[O-].[Na+].[Na+].[Na+].[Na+].[Co+2]
(4)InChI: InChI=1S/2C23H19ClN4O7S.Co.4Na/c2*1-13(29)21(22(31)25-18-9-5-3-7-16(18)24)27-26-19-12-14(10-11-20(19)30)36(34,35)28-17-8-4-2-6-15(17)23(32)33;;;;;/h2*2-12,26,28,30H,1H3,(H,25,31)(H,32,33);;;;;/q;;+2;4*+1/p-6/b2*27-21+;;;;;;
(5)InChIKey: IEZWQSSKUNSCBD-VVRQLTKLSA-H