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cypssk

Open vial of npp

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Hi ive got  over half a bottle of npp which  I stopped using  because  of Corona virus pandemic  could  it still be used  as it's been  open  over 3 months  thanks 

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9 minutes ago, cypssk said:

Out of curiosity How long after  its been opened  can  it still be used 

I assume this isn’t pharmaceutical grade so IMO, as long as you want. I’ve got stuff that’s 5-6 years old. The stopper may degrade over time but not so much of an issue if you keep it upright.

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I find the longer I leave a vial when it’s open the worse the pip is when I use it again after some time. 

 

I dont tend to bother with vials that have been left open for anything more than 6 months or so now. 

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11 minutes ago, dtmiscool said:

I find the longer I leave a vial when it’s open the worse the pip is when I use it again after some time. 

 

I dont tend to bother with vials that have been left open for anything more than 6 months or so now. 

I wonder if that’s why I had to bin an open vial of test I found a while ago. Can’t remember the lab but the pip was crippling

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