The Molecular Structure of (2,2'-Biquinoline)-4,4'-dicarboxylic acid, sodium salt (1:2) (CAS NO.979-88-4):

Empirical Formula: C₂₀H₁₀N₂Na₂O₄
Molecular Weight: 388.2839 
IUPAC: disodium 2-(4-carboxylatoquinolin-2-yl)quinoline-4-carboxylate  
Appearance: Light yellow powder
Nominal Mass: 388 Da
Average Mass: 388.2839 Da
Monoisotopic Mass: 388.043597 Da 
Flash Point: 332.5 °C
Enthalpy of Vaporization: 97.44 kJ/mol
Boiling Point: 626.2 °C at 760 mmHg
Vapour Pressure: 1.51E-16 mmHg at 25°C 
InChI
InChI=1/C20H12N2O4.2Na/c23-19(24)13-9-17(21-15-7-3-1-5-11(13)15)18-10-14(20(25)26)12-6-2-4-8-16(12)22-18;;/h1-10H,(H,23,24)(H,25,26);;/q;2*+1/p-2
Smiles
[Na+].[Na+].n1c(cc(c2ccccc12)C(=O)[O-])c1nc2ccccc2c(c1)C(=O)[O-] 
Classification Code: TSCA Flag P [A commenced PMN (Premanufacture Notice) substance]

 (2,2'-Biquinoline)-4,4'-dicarboxylic acid, sodium salt (1:2) (CAS NO.979-88-4) is used to determine the concentration of protein.

Hazard Codes: XnXi
Risk Statements: 36/37-42-36/38-36/37/38-20/21/22
R36/37:Irritating to eyes and respiratory system
R42:May cause sensitization by inhalation
R36/38:Irritating to eyes and skin
R36/37/38:Irritating to eyes, respiratory system and skin
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed
Safety Statements: 22-26-36/37-45-36 
S22:Do not breathe dust
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S36/37:Wear suitable protective clothing and gloves
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S36:Wear suitable protective clothing
WGK Germany: 3

 (2,2'-Biquinoline)-4,4'-dicarboxylic acid, sodium salt (1:2) (CAS NO.979-88-4) is also called as (2,2'-Biquinoline)-4,4'-dicarboxylic acid, disodium salt .