N shelf life

[markg109]

I have liquid N unopened with an expiration date of 2020. I've read different reports on the shelf life, some say two years after expiration, some say twenty. I know that the powder form has a longer shelf life, but if a sterile bottle is left unopened in a dark, dry, temperature safe environment, should I be concerned about it losing it's potency?

 

[Superfluous]

Best answer I could find is "many years" (beyond it's expiration date). PPeH 2019 states:

The liquid should be clear and colourless. Any colouration or precipitation of the liquid means that further testing and assay will be required.

You seem to be storing it correctly and have left it unopened so I wouldn't be too concerned. Do you have any idea how long you will keep it before use?

 

[Honigwaffel]

I would second what Superfluous said.

A told me that putting it in the fridge can improve the shelf live. As long as you don't put it in direct sunlight and make sure it doesn't get hot, you should be fine.

 

[snowman626]

i heard that when it turns bad you will see little things floating in the liquid. so if the liquid is clear then it's still good

 

[markg109]

Best answer I could find is "many years" (beyond it's expiration date). PPeH 2019 states:

The liquid should be clear and colourless. Any colouration or precipitation of the liquid means that further testing and assay will be required.

You seem to be storing it correctly and have left it unopened so I wouldn't be too concerned. Do you have any idea how long you will keep it before use?

Thanks all, I have no immediate plans to use it, it sort of depends on how my physical illness progresses and how much pain I'm able to tolerate.