Just because its not so obvious does not mean that it is On the contrary actually. Its the fact that it is able to go unnoticed that it is dangerous because everyone carries on as they normally would while breathing in the gas. Besides the dangers that long-term exposure to chlorine gas can cause, there are also immediate concerns that need to be taken into consideration.
When floors are cleaned using cleaning agents like bleach, the bleach is not only limited to reacting on the floor surface