CAS: 143-50-0
EINECS: 205-601-3
Following is the Molecular Structure of  Kepone (143-50-0):

SMILES: ClC54C(=O)C1(Cl)C2(Cl)C5(Cl)C3(Cl)C4(Cl)C1(Cl)C2(Cl)C3(Cl)Cl
InChI: InChI=1/C10Cl10O/c11-2-1(21)3(12)6(15)4(2,13)8(17)5(2,14)7(3,16)9(6,18)10(8,19)20
InChIKey: LHHGDZSESBACKH-UHFFFAOYAM
Std.InChI: InChI=1S/C10Cl10O/c11-2-1(21)3(12)6(15)4(2,13)8(17)5(2,14)7(3,16)9(6,18)10(8,19)20
Std.InChIKey: LHHGDZSESBACKH-UHFFFAOYSA-N
Molecular Formula: C₁₀Cl₁₀O
Molecular Weight: 490.64
Boiling Point: 450.5℃ at 760mmHg
Flash Point: 189.8℃
Molar Volume: 215.6cm³
Density: 2.27g/cm³
Molar Refractivity: 86.66cm³
Surface Tension: 79.6dyne/cm
Polarizability: 34.35 10^-24cm³
Enthalpy of Vaporization: 70.93kJ/mol
Vapour Pressure: 2.63E-08mmHg at 25℃

Used in the production of pesticide.

NTP 10th Report on Carcinogens. IARC Cancer Review: Group 2B IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7(1987),p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Limited Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 20 (1979),p. 67.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 20 (1979),p. 67.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . EPA Genetic Toxicology Program.

Hazard Codes: T Toxic,  N Dangerous for the environment.
RIDADR: 2761
RTECS: PC8575000
HazardClass: 6.1(b)
PackingGroup: III
Risk Statements: 24/25-40-50/53
R24/25: Toxic in contact with skin and if swallowed.
R40: Limited evidence of a carcinogenic effect.
R50/53: Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 22-36/37-45-60-61
S22: Do not breathe dust.
S36/37: Wear suitable protective clothing and gloves.
S45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).
S60: This material and/or its container must be disposed of as hazardous waste.
S61: Avoid release to the environment. Refer to special instructions safety data sheet.
Confirmed carcinogen with experimental carcinogenic data. Poison by ingestion, skin contact. Experimental teratogenic and reproductive effects. Mutation data reported. Inhalation, absorption, or ingestion by humans can lead to central nervous system, liver, and kidney damage, including bizarre symptoms caused by damage to the nervous system. Usually, the symptoms are tremors, ataxia, skin changes, hyperexcitability, hyperactivity, muscle spasms, testicular atrophy, low sperm count, estrogenic effects, sterility, breast enlargement, liver lesions, and cancer. An insecticide and fungicide. Registration suspended by the USEPA.

DFG MAK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
NIOSH REL: (Kepone) CL 0.001 mg/m³/15M

For occupational chemical analysis use NIOSH: Kepone, 5508.

 Kepone (143-50-0),which also can be called for 1,1a,3,3a,4,5,5,5a,5b,6-Decachlorooctahydro-1,3,4-metheno-2h-cyclobuta(cd)pe ; 1,1a,3,3a,4,5,5,5a,5b,6-Decachlorooctahydro-1,3,4-metheno-2H-cyclobuta(cd)pentalen-2-one ; 1,1a,3,3a,4,5,5,5a,5b,6-Decachloro-octahydro-1,3,4-metheno-2h-cyclobuta[cd]pen ; 1,2,3,4,5,5,6,7,8,9,10,10-Dodecachlorooctahydro-1,3,4-metheno-2-cyclobuta-(c,d) ; 1,2,3,5,6,7,8,9,10,10-Decachloro(5.2.1.0(sup2,6).0(sup3,9).0(sup5,8))decan ; 1,2,3,5,6,7,8,9,10,10-Decachloro(5.2.1.02,6.03,9 .05,8)decan-4-one ; 1,3,4-Metheno-2H-cyclobuta(cd)pentalen-2-one, 1,1a,3,3a,4,5,5,5a,5b,6-decachloroctahydro- ; 1,3,4-Metheno-2h-cyclobuta(cd)pentalen-2-one,1,1a,3,3a,4,5,5,5a,5b,6-decachlor . Kepone (143-50-0) is an odorless colorless crystalline solid and it should be stored at 0℃-6℃. It's insoluble in water.