Isobenzan

Isobenzan^[1][2]

Names
IUPAC name 1,3,4,5,6,7,8,8-Octachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran
Other names Telodrin; 1,3,4,5,6,7,8,8-Octachloro-4,7-methylene-3a,4,7,7a-tetrahydro-isobenzofuran
Identifiers
CAS Number	297-78-9
3D model (Jmol)	Interactive image
ECHA InfoCard	100.005.497
KEGG	C18960
RTECS number	PC1225000
SMILES ClC1C2C3(Cl)C(Cl)=C(Cl)C(C3(Cl)Cl)(Cl)C2C(Cl)O1
Properties
Chemical formula	C9H4Cl8O
Molar mass	411.73 g·mol^−1
Appearance	Whitish to light brown crystalline powder
Density	1.87 g/cm^3
Melting point	121.3 °C (250.3 °F; 394.4 K)
Solubility in water	Practically insoluble
Hazards
EU classification (DSD)	T+, N
R-phrases	R27/28 R50
S-phrases	S28 S36/37 S45 S61
NFPA 704	0 4 0
Flash point	Non-flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
verify (what is  ?)
Infobox references

Isobenzan (telodrin) is a highly toxic organochloride insecticide. It was produced only in the period from 1958 to 1965 and its use has been since discontinued.^[1] It is a persistent organic pollutant that can remain in soil for 2 to 7 years, and the biological half-life of isobenzan in human blood is estimated to be about 2.8 years.^[1]

It is classified as an extremely hazardous substance in the United States as defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. 11002), and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities.^[3]

References

1. Isobenzan, International Programme on Chemical Safety
2. Isobenzan at Sigma-Aldrich
3. "40 C.F.R.: Appendix A to Part 355—The List of Extremely Hazardous Substances and Their Threshold Planning Quantities" (PDF) (July 1, 2008 ed.). Government Printing Office. Retrieved October 29, 2011.