Help Does sodium niterite oxidize in air into niterate?

[hamednova]

Final exit says yes, but public research on the net says no or mixed info. Anyone have a spare bottle willing leave open and to test to a lab?

 

[Superfluous]

All the reliable sources I've found state that sodium nitrite very slowly oxidises to nitrate in air.

https://pubchem.ncbi.nlm.nih.gov/compound/sodium_nitrite#section=Stability-Shelf-Life

Section 3.2.9 references Toxnet and cites the peer reviewed study Budavari, S. (ed.). The Merck Index - Encyclopedia of Chemicals, Drugs and Biologicals. Rahway, NJ: Merck and Co., Inc., 1989., p. 1365.

This refers to the yellowish white crystalline solid form. Solutions of sodium nitrite are unstable & should be prepared directly before use.

 

[hamednova]

All the reliable sources I've found state that sodium nitrite very slowly oxidises to nitrate in air.

https://pubchem.ncbi.nlm.nih.gov/compound/sodium_nitrite#section=Stability-Shelf-Life

Section 3.2.9 references Toxnet and cites the peer reviewed study Budavari, S. (ed.). The Merck Index - Encyclopedia of Chemicals, Drugs and Biologicals. Rahway, NJ: Merck and Co., Inc., 1989., p. 1365.

This refers to the yellowish white crystalline solid form. Solutions of sodium nitrite are unstable & should be prepared directly before use.

I been looking around the edit wars on sodium nitrite and it looks like this was the edit that removed the oxidise clause was made back in 2011
I might try to readd it to see what happens.. or maybe not.

Sodium nitrite: Difference between revisions - Wikipedia

en.wikipedia.org

 

[Superfluous]

Firstly, I don't consider Wikipedia as a reliable source.

Concerning the edit, yes it is hygroscopic so that was worth adding, but it looks like someone simply replaced the description and omitted the effects of oxidisation in air. There are also no reliable peer-reviewed citings.

Also note the warning for the 2011 revision: This article has multiple issues

Edit: As a final note, why take the risk? It's better to assume that it will very slowly oxidise in air than ignore the possibility.

 

[hamednova]

Firstly, I don't consider Wikipedia as a reliable source.

Concerning the edit, yes it is hygroscopic so that was worth adding, but it looks like someone simply replaced the description and omitted the effects of oxidisation in air. There are also no reliable peer-reviewed citings.

Also note the warning for the 2011 revision: This article has multiple issues

Thanks looks like you might be right. Hopefully my bottle is still good.

 

[Vegrau]

Dont think it will turn into nitrate while still in solid state unless its expose to light or high temperature.

 

[hamednova]

Dont think it will turn into nitrate while still in solid state unless its expose to light or high temperature.

Iv'e seen this screencap before.. anyone got the full link?
EDIT: nvm found it

Sciencemadness Discussion Board - Nitrite shelf life - Powered by XMB 1.9.11

 

[Xaphous]

Hmm Have I affected my sn by taking the top off to look at it?

 

[Jen Erik]

Hmm Have I affected my sn by taking the top off to look at it?

No.

Not unless you left the top for a long period of time.

 

[Xaphous]

No.

Not unless you left the top for a long period of time.

Yeah after reading the above thread link seems it's not an issue overall.