Empirical Formula: C₁₃H₈N₂O₄
Molecular Weight: 256.21
IUPAC Name: 2,7-dinitro-9H-fluorene
Synonyms: Fluorene, 2,7-dinitro- ; 2,7-dinitro-fluoren ; 2,7-dinitro-9h-fluorene
Density of 2,7-Dinitrofluorene (5405-53-8): 1.489 g/cm³
Melting Point: 330-334 ^°C
Flash Point of 2,7-Dinitrofluorene (5405-53-8): 229.9 ^°C
Boiling Point: 451.5 ^°C at 760 mmHg
Vapour Pressure: 6.45E-08 mmHg at 25 ^°C
Index of Refraction: 1.705 
Chemical Properties: 2,7-Dinitrofluorene (5405-53-8) is a yellow powder

2,7-Dinitrofluorene was used as a reagent in the synthesis of benzidine and diaminofluorene prolinamide derivatives which are potent hepatitis C virus NS5A inhibitors. Also used in the synthesis of symmetric anionic polymethine dyes derived from fluorene.

A questionable carcinogen with experimental carcinogenic data. Mutation data reported. A very shock-sensitive explosive which also explodes above its melting point of 152°C. Upon decomposition it emits toxic fumes of NO_x. See also NITRO COMPOUNDS of AROMATIC HYDROCARBONS.
Safety: WARNING: Irreversible damage risk, protect skin/eyes/lungs.
Hazard Codes: Xn: Harmful
Risk Statements: 40: Limited evidence of a carcinogenic effect 
Safety Statements: 7: Keep container tightly closed
22: Do not breathe dust
36/37/39: Wear suitable protective clothing, gloves and eye/face protection
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
36: Wear suitable protective clothing 
WGK Germany: 3
RTECS: LL7175000

 2,7-Dinitrofluorene (5405-53-8) is a yellow powder and it should be used only by those trained in handling potentially hazardous materials. Moreover, it should store in tightly sealed containers in a cool place.