1. FDA certification requires the purchaser or store to provide certification
2. Smell the smell, food grade silicone should not have any smell. (Except for unformed silicone gel)
3. Baking test, general food grade silicone can withstand about 250 degrees, non-food grade can only withstand about 150 degrees unless special rubber.
4. The use ratio of food-grade silica gel is basically 1:1 or 10:1 in China.
At present, generally speaking of these four discrimination tests, the simple way is to smell the smell. Basically no manufacturer will sell industrial-grade silicone as food-grade silicone, please rest assured!