The Chromotrope 2R, with the CAS registry number 4197-07-3, is also known as Acid Chromotrope 2R and Brasilan Fast fuchsine G. Its EINECS number is 224-085-0. This chemical's molecular formula is C₁₆H₁₀N₂Na₂O₈S₂ and formula weight is 468.37. What's more, both its IUPAC name and systematic name are the same which is called Disodium 5-hydroxy-4-oxo-3-(phenylhydrazinylidene)naphthalene-2,7-disulfonate. This chemical's classification code is Mutation data which is dark brown powder.

Physical properties about this chemical are: (1)#H bond acceptors: 10; (2)#H bond donors: 4; (3)#Freely Rotating Bonds: 6; (4)Polar Surface Area: 196.34 Å²; (5)Storage Temp.: Store at RT; (6)Colour Index: 16570; (7)Stability: Stable. Incompatible with strong oxidizing agents.

When you are using this chemical, please be cautious about it as the following:
This chemical may cause inflammation to the skin or other mucous membranes. Besides, it irritates to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. Whenever you will contact it, please wear suitable protective clothing.

You can still convert the following datas into molecular structure:
(1)SMILES: [Na+].[Na+].[O-]S(=O)(=O)c1cc(O)c3c(c1)cc(c(N=Nc2ccccc2)c3O)S([O-])(=O)=O
(2)InChI: InChI=1/C16H12N2O8S2.2Na/c19-12-8-11(27(21,22)23)6-9-7-13(28(24,25)26)15(16(20)14(9)12)18-17-10-4-2-1-3-5-10;;/h1-8,19-20H,(H,21,22,23)(H,24,25,26);;/q;2*+1/p-2
(3)InChIKey: GXEAXHYQKZAJGB-NUQVWONBAJ