this post was submitted on 30 Nov 2024
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[–] r_deckard@lemmy.world 5 points 3 weeks ago (3 children)

What does potassium iodide decay into? It's not an organic compound.

[–] cabron_offsets@lemmy.world 11 points 3 weeks ago

Iodide ion, as present in KI, does not decay. Period. It’s that ion that your body requires. The tablets would serve their purpose for long after they are purchased.

[–] catloaf@lemm.ee -2 points 3 weeks ago (2 children)

I don't know, I'm not any kind of chemist. I trust the actual chemists to tell me how long the pills will be trustworthy.

[–] PumpkinSkink@lemmy.world 9 points 3 weeks ago (1 children)

As a chemist, I will go ahead and inform you confidently that Potassium Iodide in a dry place will outlast you by a significant margin. It's very chemically stable.

[–] catloaf@lemm.ee 1 points 3 weeks ago (3 children)
[–] humorlessrepost@lemmy.world 7 points 3 weeks ago* (last edited 3 weeks ago)

They’re required to put some date, and nobody wants to pay for a 50-year medical study to show what chemists already know: KI will still be KI.

[–] Earflap@reddthat.com 6 points 3 weeks ago

Regulation compliance probably

[–] Fondots@lemmy.world 5 points 3 weeks ago

Probably to account for people who won't store it properly, degradation of the packaging material, etc.

For example, if you store your blister pack of KI on a sunny shelf in your bathroom, UV rays eventually weaken the plastic packaging, cracks develop in the plastic letting in water vapor from your shower, and a stray mold space makes its way in as well and eventually you end up with mold growing on your pills. The KI itself may still be perfectly fine and able to do its job, but that mold might make you sick.

[–] leisesprecher@feddit.org 8 points 3 weeks ago

Idiodin itself can't get "bad" in any way. The carrier material might go bad, but that's also just starches and a few mineral compounds. At worst, you get powder instead of a pill.

The expiration dates on medication are intentionally extremely conservative.