IUPAC Name: 7,12-dimethyl-5,6-dihydrobenzo[a]anthracene 
Empirical Formula: C₂₀H₁₈
Molecular Weight: 258.3569g/mol
Structure of 5,6-Dihydro-7,12-dimethyl-benz(a)anthracene (CAS NO.35281-29-9):

Index of Refraction: 1.659
Molar Refractivity: 85.89 cm³
Molar Volume: 232.7 cm³
Polarizability: 34.05×10^-24cm³
Surface Tension: 45.9 dyne/cm
Density: 1.11 g/cm³
Flash Point: 210.6 °C
Enthalpy of Vaporization: 66.45 kJ/mol
Boiling Point: 435 °C at 760 mmHg
Vapour Pressure: 2.31E-07 mmHg at 25°C 
Classification Code: Tumor data 
Canonical SMILES: CC1=C2CCC3=CC=CC=C3C2=C(C4=CC=CC=C14)C
InChI: InChI=1S/C20H18/c1-13-16-8-5-6-9-17(16)14(2)20-18(13)12-11-15-7-3-4-10-19(15)20/h3-10H,11-12H2,1-2H3
InChIKey: OSPZOOPTBDSTQN-UHFFFAOYSA-N

Questionable carcinogen with experimental carcinogenic data by skin contact. When heated to decomposition it emits acrid smoke and irritating fumes.

  5,6-Dihydro-7,12-dimethyl-benz(a)anthracene , its cas register number is 35281-29-9. It also can be called BRN 2111994 ;  NSC 113558 ; Benz(a)anthracene, 5,6-dihydro-7,12-dimethyl- . When 5,6-Dihydro-7,12-dimethyl-benz(a)anthracene (CAS NO.35281-29-9) is heated to decomposition, it emits acrid smoke and irritating fumes.