Molecular Structure of 1,4,4a,8a-Tetrahydro-1,4-methano-naphthalene-5,8-dione (CAS NO.1200-89-1):

IUPAC: 1,4,4a,8a-Tetrahydro-1,4-methanonaphthalene-5,8-dione
Molecular Formula:C₁₁H₁₀O₂
Molecular Weight:174.2
Product Categories:Naphthalene derivatives
Density:1.273 g/cm³
Melting point:77-79^oC(lit.)
Boiling point:317.6^oC at 760 mmHg
Flash point:118.9^oC
Index of Refraction:1.592
Molar Volume:136.7 cm³
Surface Tension:47.7 dyne/cm  
Molar Refractivity:46.3 cm³
Enthalpy of Vaporization:55.9 kJ/mol
Vapour Pressure:0.000382 mmHg at 25^oC
SMILES:O=C1/C=C\C(=O)C2C3/C=C\C(C12)C3 
InChI:InChI=1/C11H10O2/c12-8-3-4-9(13)11-7-2-1-6(5-7)10(8)11/h1-4,6-7,10-11H,5H2 
InChIKey:FQLRTGXTYFCECH-UHFFFAOYAF 

Reported in EPA TSCA Inventory.

Poison by intraperitoneal route. When heated to decomposition it emits acrid smoke and irritating vapors.

Safety information of 1,4,4a,8a-Tetrahydro-1,4-methano-naphthalene-5,8-dione (CAS NO.1200-89-1):
WGK Germany:3

 1,4,4a,8a-Tetrahydro-1,4-methano-naphthalene-5,8-dione with cas registry number of 1200-89-1 is also known as 1,4-Methanonaphthalene-5,8-dione,1,4,4a,8a-tetrahydro- ; Tricyclo[6.2.1.0~2,7~]undeca-4,9-diene-3,6-dione ; (1RS,4SR,4aRS,8aSR)-1,4,4a,8a-Tetrahydro[1,4-methanonaphtalen]-5,8-dione ; 1, 4-Methanonaphthalene-5,8-dione, 1,4,4a,8a-tetrahydro- ; 1,4,4-.Alpha.,8-.alpha.-tetrahydro-endo-1,4-methanonaphthalene-5,8-dione ; 1,4,4a,8a-Tetrahydro-1,4-methanonaphthalene-5,8-dione ; 1,4,4a,8a-Tetrahydro-endo-1,4-methanonaphthalene-5,8-dione ; 1,4,4-Alpha,8-alpha-tetrahydro-endo-1,4-methanonaphthalene-5,8-dione ; Cyclopentadienebenzoquinone ; Endo-Tricyclo[6.2.1.0(2,7)]undeca-4,9-diene-3,6-dione . 1,4,4a,8a-Tetrahydro-1,4-methano-naphthalene-5,8-dione with cas registry number of 1200-89-1 is used as a pharmaceutical intermediate for the analysis of more complex chemical compounds.