Teflon in high temperature cracking also produces highly toxic by-products such as fluorine gas and perfluoroisobutene, so special attention should be paid to the safety and protection of polytetrafluoroethylene to prevent contact with open flames.
The content and toxicity often increase with the heating temperature. Inhalation of thermal decomposition products can cause poisoning. Poisoning of light manifested as fever and "cold-like" symptoms; heavy respiratory tract irritation symptoms, chemical bronchitis, pneumonia, and even pulmonary edema and myocardial damage. Long-term exposure to low concentrations of pyrolysis products, often headache, dizziness, insomnia, nightmares, memory loss, fatigue, back pain, etc.
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