This chemical is called Mordant Orange 3, and its systematic name is Benzenesulfonic acid, 4-(4,5-dihydro-4-(2-(2-hydroxy-5-nitrophenyl)diazenyl)-3-methyl-5-oxo-1H-pyrazol-1-yl)-, sodium salt (1:1). With the molecular formula of C₁₆H₁₃N₅O₇S.Na, its molecular weight is 442.35. The CAS registry number of this chemical is 6359-86-0.

Other characteristics of the Mordant Orange 3 can be summarised as followings: (1)Molecular Weight 441.35055 [g/mol]; (2)Molecular Formula C16H12N5NaO7S; (3)H-Bond Donor: 1; (4)H-Bond Acceptor: 10; (5)Rotatable Bond Count: 3; (6)Tautomer Count: 15; (7)Exact Mass: 441.035513; (8)MonoIsotopic Mass: 441.035513; (9)Topological Polar Surface Area: 186; (10)Heavy Atom Count: 30; (11)Formal Charge: 0; (12)Complexity: 949; (13)Isotope Atom Count: 0; (14)Defined Atom StereoCenter Count: 0; (15)Undefined Atom StereoCenter Count: 1; (16)Defined Bond StereoCenter Count: 1; (17)Undefined Bond StereoCenter Count: 0; (18)Covalently-Bonded Unit Count: 2.

You can still convert the following datas into molecular structure:
1.Canonical SMILES: CC1=NN(C(=O)C1NN=C2C=C(C=CC2=O)[N+](=O)[O-])C3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]
2.Isomeric SMILES: CC1=NN(C(=O)C1N/N=C/2\C=C(C=CC2=O)[N+](=O)[O-])C3=CC=C(C=C3)S(=O)(=O)[O-].[Na+]
3.InChI: InChI=1S/C16H13N5O7S.Na/c1-9-15(18-17-13-8-11(21(24)25)4-7-14(13)22)16(23)20(19-9)10-2-5-12(6-3-10)29(26,27)28;/h2-8,15,18H,1H3,(H,26,27,28);/q;+1/p-1/b17-13+;