this post was submitted on 30 Nov 2024
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[–] [email protected] 5 points 3 weeks ago (3 children)

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

[–] [email protected] 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.

[–] [email protected] -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.

[–] [email protected] 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.

[–] [email protected] 1 points 3 weeks ago (3 children)
[–] [email protected] 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.

[–] [email protected] 6 points 3 weeks ago

Regulation compliance probably

[–] [email protected] 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.

[–] [email protected] 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.