The C.I. Pigment Red 63:1, with the CAS registry number 6417-83-0 and EINECS registry number 6417-83-0, has the systematic name of calcium 3-hydroxy-4-[(1-sulfonato-2-naphthyl)azo]naphthalene-2-carboxylate. It is a kind of red powder, and insoluble in water. And the molecular formula of the chemical is C₂₁H₁₂CaN₂O₆S. What's more, it is always used for the pigmentation of paint, rubber, leather, paints and stationery printing paste.

The physical properties of C.I. Pigment Red 63:1 are as followings: (1)#H bond acceptors: 8; (2)#H bond donors: 3; (3)#Freely Rotating Bonds: 5; (4)Polar Surface Area: 150.66 Å².

You can still convert the following datas into molecular structure:
(1)SMILES: [Ca+2].[O-]S(=O)(=O)c3c4ccccc4ccc3N=Nc1c2ccccc2cc(C([O-])=O)c1O
(2)InChI: InChI=1/C21H14N2O6S.Ca/c24-19-16(21(25)26)11-13-6-2-3-7-14(13)18(19)23-22-17-10-9-12-5-1-4-8-15(12)20(17)30(27,28)29;/h1-11,24H,(H,25,26)(H,27,28,29);/q;+2/p-2
(3)InChIKey: OVHKKOQGPOYPLY-NUQVWONBAQ