Is it true that it's dangerous to use plastics in the microwave?

In 2002, we became aware of an e-mail that was being widely circulated, which warned consumers about the alleged dangers of using plastics in the microwave. This e-mail claimed that the combination of fat, high heat and plastics releases dioxin into the food and ultimately into the cells of the body, thereby increasing the risk of producing cancerous cells. SC Johnson researched these claims, and it is clear that the information is not only misleading, but also unnecessarily alarms consumers.

When used in the microwave, there is no trace level migration of dioxins from any Saran™ plastic wrap or Ziploc® brand product. This is known because these products are 100 percent dioxin-free. You also should be aware that dioxins can only be formed when chlorine is combined with extremely high temperatures, such as the temperatures generated in waste incinerators. Those incinerators produce temperatures of more than 1,500 degrees Fahrenheit, an extreme temperature that even the most powerful consumer microwave ovens are unable to produce.

Saran™ plastic wrap and Ziploc® brand products can be used with confidence when label directions are followed. All Saran™ plastic wrap, Ziploc® brand containers and microwaveable Ziploc® Bags meet the safety requirements of the U.S. Food and Drug Administration (FDA) for temperatures associated with defrosting and reheating food in microwave ovens, as well as room, refrigerator and freezer temperatures.