Chemical for humidity control? Bovida pack content?

[poul hansen]

Hello
Has anybody found out what chemical is used in the humidity packs?

[NDO]

Not 100% sure on Bovida brand but most are a mixture of water and propylene glycol. Some humidifiers absorb the mix in a superabsorbent polymer (diaper absorbent), typically sodium polyacrylate.

[Sue Rieter]

Not 100% sure on Bovida brand but most are a mixture of water and propylene glycol. Some humidifiers absorb the mix in a superabsorbent polymer (diaper absorbent), typically sodium polyacrylate.

So is it safe and inert?

[NDO]

So is it safe and inert?

Propylene glycol is RV antifreeze and is generally considered food safe. That doesn’t necessarily mean it’s safe for all finishes.
Sodium polyacrylate is pretty much inert.

[NDO]

Whoops, I should have looked it up before posting. Boveda packs do NOT use propylene glycol. They are a mixture of water, potassium citrate, and xanthan gum. Also food safe stuff. Probably less likely to harm a finish than glycol.