Why should you take precautions when working with chemicals?

First of all, chemicals are different. But the most interesting and we can say dangerous is that sometimes we do not know what can happen when mixing chemicals. Therefore, in any case, it is not worth the risk. And now, specifically, what can threaten health from contact with chemicals. If acid gets on the skin, it can lead to the formation of ulcers that are very difficult to heal. Various solvents and substances that are readily volatile can lead to poisoning. And spilling various solvents in the presence of alkali metals can easily cause a fire, especially if you work with alkali metals.