Well, I would certainly not allow sodium azide to be handled in this way in any laboratory I was working in.
I do not know the specific industrial standards and handling procedures that should be adhered to (there are regulars on here who will), or the specific precautions that must legally be in place, but I will briefly run over the safety precautions I take in chemical laboratories working with small quantities (<5 g) of sodium azide.
Sodium azide is a nasty poison - it is not quite as dangerous as sodium cyanide, but not far off. The biggest hazard associated with it is contact with acid, forming hydrazoic acid, which is a very toxic gas. The risk of exposure to a gas (inhalation) is much higher than that of a solid (ingestion).
1. Sodium azide should be handled in a fume hood. This is especially important for fine powders where the ingestion risk is increased by the increased risk of airborne dust. A mask should also be worn when handling large quantities or very fine powders. Use of a fume hood provides a ventilated area in which spillage/surface contamination is contained. There should be very strict protocols in place to prevent contamination of surfaces outside the fumehood - e.g. contamination of door handles is completely unacceptable and potentially very dangerous. Proper use of gloves and handwashing should contain the contamination to the fumehood. A fumehood protects from dust exposure and, in case of acid contact, from gas exposure.
2. Every precaution should be taken to minimise the risk of contact with acid. That means no acid in the fume hood containing sodium azide.
3. Gloves, eye protection and a lab coat/apron should always be worn.
Maybe I am overly cautious with sodium azide, but if I walked into a lab where on an open bench there were razor blades and a pile of sodium azide powder, I would immediately report it without hesitation
. It is definitely unsafe, there is an unnecessarily high risk of harmful short term exposure, and sodium azide may
cause long term problems through repeated exposure (see MSDS).
that the current way in which this is handled does not conform to legal health and safety requirements, but be aware that I am not an expert in heath and safety law.
MSDS for sodium azide: https://www.sciencelab.com/msds.php?msdsId=9927588