The Toxicity of Polyester and PET
I was helping a reader evaluate a product made from polyethylene terephthalate and thought it would be helpful to share the information because it can be confusing. This material has more than one chemical name as well as many brand names. Also, surprisingly, it is not a phthalate!
The Toxicity of Silicone
Silicone is safe at room temperature but not recommended for baking.
The Toxicity of Polypropylene
Polypropylene is one of the safest plastics but it can offgas and have unknown chemical additives.
The Toxicity of Polyurethane
There are different types of polyurethane and they have different levels of toxicity.