if you have poison and it goes out of date does it still stay as poison or does it unpoison?

Question: if you have poison and it goes out of date does it still stay as poison or does it unpoison?
- Keywords:
  poison
Asked by anon-210517 to Tori, Titus, Stuart, Hannah, Gill on 13 Mar 2019.
- Hannah Dalgleish answered on 13 Mar 2019:
  
  I think it’s probably still poison, at least I wouldn’t trust it!
- Gill Harrison answered on 14 Mar 2019:
  
  I don’t have a clue what the answer to this is, but would steer well clear just in case.
  It might lose it’s potency, but there again it might be more poisonous.
- Stuart Higgins answered on 14 Mar 2019:
  
  To be safe, you should always assume that something that’s poisonous will stay poisonous.
  
  It depends on what chemical the poison is made of. When we talk about chemicals going out of date, what we mean is that that particular chemical is likely to breakdown into other chemicals with time, or react with oxygen or water in the air and change into a different chemical (so no longer work the same way).
  
  Because there are lots of different kinds of chemicals that are poisonous, some will stay dangerous, and others might become less dangerous. But again, always assume dangerous.

Question: if you have poison and it goes out of date does it still stay as poison or does it unpoison?