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[A-2.4 Human Impact of Halon Alternatives]

[Contact Person]

Akio Yasuhara
Environmental Chemistry Division
National Institute for Environmental Studies
16-2 Onogawa, Tsukuba, Ibaraki 305, Japan
Phone +81-298-50-2544, Fax +81-298-50-2574

[Total Budget for FY1993-FY1995]

53,582,000 Yen (FY1995; 14,568,000 Yen)

[Abstract]

　The following halon alternatives including halon 1301 and halon 1211 were used for toxicity test and pyrolysis experiments: 2H-heptafluoropropane, trifluoroiodomethane, perfluorotriethylamine, N,N-bis(trifluoromethyl)-2H-tetrafluoroethylamine, N,N-bis(trifluoromethyl)-2-bromo-tetrafluoroethylamine, perfluorodimethylvinylamine, and perfluoro-N-ethylpyrrolidine . All halon alternatives except for perfluorodimethylvinylamine did not show prominent genotoxicity and cytotoxicity. Toxicities of whole pyrolysis products from 2H-heptafluoropropane and perfluorotriethylamine were also examined. Pyrolysis products of perfluorotriethylamine showed weak cytotoxicity and no genotoxicity, although those of 2H-heptafluoropropane did not show any toxic effects. Pyrolysis of halon alternatives produced large amounts of hydrogen fluoride. Organic pyrolysis products from halon alternatives were a few and a little. Starting temperatures of pyrolysis depended on molecular structures and element composition.

[Key Words]

Halon alternatives, Genotoxicity, Cytotoxicity, Culture cells, Pyrolysis