Empirical Formula of N-Fluoren-1-ylbenzohydroxamic acid (CAS NO.29968-64-7): C₂₀H₁₅NO₂ 
Molecular Weight: 301.3386  
Index of Refraction: 1.724
Density: 1.329 g/cm³
Flash Point: 262.8 °C
Enthalpy of Vaporization: 82.33 kJ/mol
Boiling Point: 511 °C at 760 mmHg
Vapour Pressure: 2.89E-11 mmHg at 25 °C 
Structure of N-Fluoren-1-ylbenzohydroxamic acid (CAS NO.29968-64-7):
                              
IUPAC Name: N-(9H-Fluoren-1-yl)-N-hydroxybenzamide
Canonical SMILES: C1C2=CC=CC=C2C3=C1C(=CC=C3)N(C(=O)C4=CC=CC=C4)O
InChI: InChI=1S/C20H15NO2/c22-20(14-7-2-1-3-8-14)21(23)19-12-6-11-17-16-10-5-4-9-15(16)13-18(17)19/h1-12,23H,13H2
InChIKey: QYMLLILLMBKAAO-UHFFFAOYSA-N

Questionable carcinogen with experimental neoplastigenic data. When heated to decomposition N-Fluoren-1-ylbenzohydroxamic acid (CAS NO.29968-64-7) emits toxic fumes of NO_x.

 N-Fluoren-1-ylbenzohydroxamic acid , its cas register number is 29968-64-7. It also can be called BRN 2947917 ; Benzohydroxamic acid, N-fluoren-1-yl- ; and N-Hydroxy-1-fluorenylbenzamide .