Molecule structure of 4H-Cyclopenta(def)phenanthrene (CAS NO.203-64-5) :

Molecular Weight: 190.2399 g/mol
Molecular Formula: C₁₅H₁₀
Density: 1.257 g/cm³
Melting Point: 113-115 °C(lit.)
Boiling Point: 353 °C at 760 mmHg
Flash Point: 168.8 °C  
Appreance: white crystals
Water Solubility: 1.1 mg/L at 27 °C
Molar Volume: 151.2 cm³
Polarizability: 25.72*10^-24 cm³
Surface Tension: 60 dyne/cm 
Enthalpy of Vaporization: 57.43 kJ/mol
Vapour Pressure: 7.52E-05 mmHg at 25 °C 
Henry's Law Constant: 2.08E-05 atm-m³/mole at 25 °C
Atmospheric OH Rate Constant: 4.00E-11 cm³/molecule-sec at 25 °C
XLogP3-AA: 4.4 
Exact Mass: 190.07825
MonoIsotopic Mass: 190.07825
Heavy Atom Count: 15
Complexity: 231
Canonical SMILES: C1C2=CC=CC3=C2C4=C(C=CC=C41)C=C3
InChI: InChI=1S/C15H10/c1-3-10-7-8-11-4-2-6-13-9-12(5-1)14(10)15(11)13/h1-8H,9H2
InChIKey: RKZDZWJDQTZDLD-UHFFFAOYSA-N
EINECS: 205-905-6

Questionable carcinogen with experimental tumorigenic data. When heated to decomposition it emits acrid smoke and irritating fumes.
Risk Statements: 36/37/38
R36/37/38: Irritating to eyes, respiratory system and skin
Safety Statements: 22-24/25
S22: Do not breathe dust
S24/25: Avoid contact with skin and eyes
RIDADR: 2811
WGK Germany: 3
RTECS: GY5280000
HazardClass: 6.1(b)
PackingGroup: III 

 4H-Cyclopenta(def)phenanthrene (CAS NO.203-64-5) is also called 4,5-Methylenephenanthrene ; 4,5-Phenanthrylenemethane ; Benzo(def)fluorene ;Cyclopenta[def]phenanthrene ; Cyclopentaphenanthrene . 4H-Cyclopenta(def)phenanthrene (CAS NO.203-64-5) is stable and combustible. It is incompatible with strong oxidizing agents.