[Biostartup]

Hi all,

I'm new to the forums and just wanted a second take on my concerns about using sodium azide (powder form).

Occasionally I have to add small amount of sodium azide in powder form to a solution to use as a preservative (0.04-0.08g).

I use an analytical scale (with the slide-able glass "walls").

My PPE is nitrile gloves, lab coat, and a face mask to prevent inhalation through dust generation. I try to isolate any handling of the chemical to within the analytical scales glass.

Is this sufficient for such small amount? After adding some today I just became worried because I've read the SDS and know how dangerous this stuff is. Or am I over-reacting here?

Any advice is welcome, thanks!

[wildfyr]

I work with sodium azide in small amounts, and I usually don't use a mask. But your precautions sound good.

The main trick of the trade is to not use a metal spatula. Use a plastic spoon to weigh it.

[Babcock_Hall]

What is the problem with the metal spatula?

[Borek]

What is the problem with the metal spatula?

If memory serves me well it can catalyze explosion of azides.

[wildfyr]

Sodium azide isn't very sensitive, but say, chromium or iron azide is. You can create those on the surface of a stainless steel spatula by ion exchange.