Molecular Structure of 2,3,4-Trihydroxybenzophenone naphthoquinone-1,2-diazido-5-sulfonate (CAS NO.68510-93-0):

IUPAC Name: [4-(2,3,4-trihydroxybenzoyl)phenyl] 6-diazenyldiazenyl-5-oxo-8H-naphthalene-1-sulfonate
Empirical Formula: C₂₃H₁₆N₄O₈S 
Molecular Weight: 508.4601 
Index of Refraction:  1.731 
Surface Tension:  74.6 dyne/cm 
Density:  1.62 g/cm³ 
Flash Point:  430.1 °C 
Enthalpy of Vaporization:  118.56 kJ/mol 
Boiling Point:  787.5 °C at 760 mmHg 
Vapour Pressure:  9.65E-26 mmHg at 25°C 

 2,3,4-Trihydroxybenzophenone naphthoquinone-1,2-diazido-5-sulfonate ,its cas register number is 68510-93-0. It can also be called 1-Naphthalenesulfonic acid, 6-diazo-5,6-dihydro-5-oxo-, ester with phenyl(2,3,4-trihydroxyphenyl)methanone ; 2-diazo-1-naphthol-5-sulfonic acid, ester with 2,3,4-trihydroxy benzophenone and so on.