Environmental protection investigations initiated in the 1990s proved extreme environmental hazard of perfluorosur factants based on perfluorooctane carboxylates and perfluorooctanesulfonates including "branched" or "linear fragments" --C7F15COO_ and --C8F17S 0 3_ produced "electrochemically" or by "telomerization of tetrafluoroethylene", respectively.1'2 These substances are extremely stable in the environment, unhydrolyzable, and non-biodegradable, but they are actively bioaccumulated and migrate in the food chains.3''1 Major manufacturers of long-chain fluorocarbons (such as 3M, DuPont, Daikin, etc.) have ceased or cease the production and sale of fluorocarbons, replacing them with alternative shortchain substances.

Environmental protection investigations initiated in the 1990s proved extreme environmental hazard of perfluorosur factants based on perfluorooctane carboxylates and perfluorooctanesulfonates including "branched" or "linear fragments" --C7F15COO_ and --C8F17S 0 3_ produced "electrochemically" or by "telomerization of tetrafluoroethylene", respectively.1'2 These substances are extremely stable in the environment, unhydrolyzable, and non-biodegradable, but they are actively bioaccumulated and migrate in the food chains.3''1 Major manufacturers of long-chain fluorocarbons (such as 3M, DuPont, Daikin, etc.) have ceased or cease the production and sale of fluorocarbons, replacing them with alternative shortchain substances.

Environmental protection investigations initiated in the 1990s proved extreme environmental hazard o f perfluorosur factants based on perfluorooctane carboxylates and perfluorooctanesulfonates including "branched" or "linear fragments" --C 7F 15C O O _ and --C 8F 17S 0 3_ produced "electrochemically" or by "telomerization o f tetrafluoroethylene", respectively.1'2 These substances are extremely stable in the environment, unhydrolyzable, and non-biodegradable, but they are actively bioaccumulated and migrate in the food chains.3''1 Major manufacturers of long-chain fluorocarbons (such as 3M, DuPont, Daikin, etc.) have ceased or cease the production and sale of fluorocarbons, replacing them with alternative shortchain substances.

I. duPont de Nemours and Company SUBJECT: 90-Day Feeding Study in the Beagle Dog.

I. duPont de Nemours and Company 90-Day Feeding Study in the Beagle Dog.

I. duPont de Nemours and Company, Wilmington, Delaware, on June 19, 1965.

I. duPont de Nemours and Company, Wilmington, Delaware, on June 19, 1965.