Dioxin Doubletalk
RUMOR
Freezing plastic water bottles releases dioxins into water.
STATUS
Busted!
ORIGINS
In this example, multiple e-mail hoaxes have been combined into one, illustrating that an Internet hoax can propagate by means as simple as “cut and paste.” To prolong the life a previously debunked prank, a new introduction was added to an earlier e-mail on dioxins in the microwave. If you compare the two, you can see they are virtually identical.
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WHAT YOU SHOULD KNOW
The claim that plastic water bottles will release dioxins when frozen is entirely unfounded. So is the claim that plastic food wraps and containers can release dioxins in the microwave oven.
The vast majority of plastics used in food wraps, packaging containers and beverage bottles do not contain the chemical constituents that form dioxins. In addition, dioxins are a family of compounds that are produced by combustion at high temperatures. They can only be formed during combustion at temperatures typically above 700 degrees Fahrenheit; they cannot be formed at room temperature or in freezing temperatures.
According to FDA, “ With regard to dioxins, we have seen no evidence that plastic containers or films contain dioxins and know of no reason why they would.”
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MORE RESOURCES AND INFORMATION
- Plastics and the Microwave
FDA Consumer - November/December 2002, a magazine published by the U.S. Food and Drug Administration - Microwaving Plastic
American Cancer Society - Freezing or Microwaving with Plastic: Does it Release Dioxin?
MayoClinic.com - Plastics in the Microwave
Plastics Division of the American Chemistry Council (ACC) - No Link Between Microwave Cooking and Cancer, Expert Says
Jean Weese, Ph.D., Extension Food Scientist, Alabama Cooperative Extension - Microwaving Foods and Dioxin Formation
Christina Stark, M.S., R.D., Cornell Cooperative Extension
(Must be registered member of Cornell Nutrition Works website. Registration is free.) - More on Plastics in the Microwave
Christina Stark, M.S., R.D., Cornell Cooperative Extension
(Must be registered member of Cornell Nutrition Works website. Registration is free.) - Dioxin in Containers
Joe Schwarcz, Ph.D., Director, McGill University’s Office of Science and Society - Perilous Plastic?
Nada Mangialetti, Ph.D., for the American Council on Science and Health
Other MythBusting Websites
- BottleRoyale
Snopes.com - Plastics, Microwaves, and Dioxins…OH MY!
BreakTheChain.org - Don’t Use Plastic for Heating Foods in a Microwave Oven Because of Exposure to Dioxins – Unproven! & Fiction!
TruthOrFiction.com




DIOXINS Carcinogens cause cancer. Especially breast cancer. Don't freeze your plastic water bottles with water as this also releases dioxins in the plastic. 

Don’t be fooled by fake IDs. To sound more believable, versions of this rumor falsely identify a health authority, such as Johns Hopkins University or Walter Reed Medical Center, as the source of the misinformation. Some versions even go so far as to include a person’s name and affiliation to give the appearance that a particular individual was the original sender.