In our life, we often encounter a variety of things that we haven't seen before. Whether edible salt can be used after discoloration has become a problem of concern to us. Today, we will briefly describe the reasons why edible salt turns blue, green and red.
1. Salt should turn blue when it is wet, because the color of iodine is blue. The reason for the smell of iodine is that it has a bad smell
2. If it turns green, it may react with heavy metals in some containers. It's also inedible
3. Edible salt turns red due to chemical changes in iodine and its substances.
Warm reminder: do not eat salt after discoloration to avoid nitrite poisoning.