Is plastic 1 safe?

Understanding Plastic Safety

It's important to note that plastics numbered 2, 4, and 5 are generally considered safer options. While plastic number 1 is safe, it should not be reused. On the other hand, plastics numbered 6 and 7 should be avoided when possible. Additionally, if plastic packaging claims to be microwavable, keep in mind that it signifies only that it won't melt in the microwave, not necessarily that it's entirely safe for food use.