This is a difficult question to answer, and there is no clear answer yet. They are very stable polymers that can withstand various temperatures and chemicals, so we consider them relatively safe. Many experts and relevant authorities believe that silicone is non-toxic and can safely come into contact with food and water. For example, Health Canada has stated that there are currently no known health hazards associated with the use of silicone cookware. Silicone rubber does not react with food or beverages, nor does it produce any harmful smoke.
Although research has confirmed that silicone is very stable, they are not completely inert and do not release chemicals. Some silicone gels have shown biological effects, such as causing tissue inflammation; There are also studies suggesting that silicone may release chemicals.
For example, a study tested the release of siloxanes from silicone pacifiers and baking utensils into simulated solutions of milk, infant formula, alcohol, and water, and found that after 6 hours, nothing was released into milk or formula; But after 72 hours, several siloxanes will be detected in the alcohol solution.
It is generally believed that siloxanes may interfere with endocrine function, some of which are associated with cancer. Due to the widespread use of siloxanes in the manufacture of silicone polymers and household products, the concentration of siloxanes in land, air, and water has now reached detectable levels, and because they are durable, they may persist in the environment for a long time.
The conclusion is that the scientific evidence for silicone is still weak and there is no conclusive evidence, but the problem and uncertainty lie there. Therefore, close attention should be paid to this material, especially now that people are increasingly concerned about chemicals that can interfere with endocrine function, because as long as a generation has a very small amount of exposure, it may cause health problems.
Summary: Silicone has high stability, but it does not mean that it will not release chemicals.