Talk:Sodium azide

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Contents 1 Alternative preparation 2 Antibodies 3 Preservative 4 Other Name? 5 Half life in Water?

[edit] Alternative preparation

I recall reading that NaN₃ can also be obtained by oxidizing hydrazine with sodium nitrite.

NO₂^– + N₂H₄ → N₃^– + 2H₂O

If I can find a reference for this, I will post it to the article. Karlhahn 16:43, 22 August 2006 (UTC)

[edit] Antibodies

It seems to be a normal thing to dilute antibodies in, why is this? --David Munch 14:24, 14 June 2007 (UTC)

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[edit] Preservative

Sodium Azide is used as a preservative in solutions containing antibodies.

[edit] Other Name?

Can there be something in the introduction that says it is also known as heavy sodium? I was searching for heavy sodium and was referred to this article which was 100%.

[edit] Half life in Water?

I read on here that NaN3 will slowly convert to HN3. I looked on the internet and it seemed like HN3 is a gas? Also, the wiki page on HN3 makes it seem like it has properties are similar to NaN3. I am asking because we have a 1 molar solution of this dissolved in water that has been around since 2004 or so. I was curious how fast it degrades and if the solutions are still good. We are using it in a protease cocktail to preserve skinned (demembranated) straited muscle. Also, if it does go bad, how long would a 1M solution last at room temp? Thanks a lot, Rjkd12 15:29, 11 October 2007 (UTC)

I revised that misleading statement. Prototonations virtually do not require time, the conversion ot HN3 is instantaneous but fortunately proceeds to a limited extent. --Smokefoot 18:11, 11 October 2007 (UTC)

Thanks a lot for the response. I'm still curious its 1/2 life in water. I tried looking it up with sigma, but none of the pages talk about a 1/2 life. As I said earlier I have some from around 05 that is 1 molar and want to know if its ok. A lot of things say its not stable in water due to the conversion, but you claim thats to a limited extent. Also, if it is to a limited extent, does uncapping and recapping the same container, which allows fresh air to get in there keep the equilibrium down so it continuously converts? Thanks a lot, I appreciate everything. Also, if you have a 1/2 life a source would be very helpful so I can put it in my lab notebook. Thanks again, Rjkd12 15:24, 29 October 2007 (UTC)