Given what we know about lab safety, we can confirm that the best way to smell a chemical sample when needed, is to place the sample under your nose at a safe distance and smell very slowly.
Many chemicals can at times emit relatively toxic fumes. These fumes can be very dangerous to inhale. Therefore, it is best to take safety precautions when attempting to smell a sample. Placing the sample at a distance and smelling slowly is a good habit as it gives you time to react to an unpleasant or potentially dangerous smell.
Therefore, we can confirm that since many chemicals in a lab can be dangerous and can often have relatively toxic fumes, extreme care should be taken if attempting to smell them. Placing the sample at a safe distance and smelling slowly is a good safety precaution to take.
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