What the hell is silica gel?

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Those little packets of silica gel that read "do not eat" that fall out of boxes sometimes (things like TV's , radios etc). What are they for? Has anyone ever actually used one of these sachets?

jel --, Tuesday, 7 May 2002 00:00 (twenty-one years ago) link

It preserves crispiness and crunchiness. They're practically cabin buddies with any big bag of rice crackers.

Brian MacDonald, Tuesday, 7 May 2002 00:00 (twenty-one years ago) link

They are always in handbags when I buy them. They're a drying agent aren't they?

Emma, Tuesday, 7 May 2002 00:00 (twenty-one years ago) link

They are anhydrous crystals of silica which absorb moisture and become hydrated, thus drying the atmosphere in any container they're in. The plastic bag must be somehow permeable to allow the gel to work. The drying efficiency depends on the relative humidity - if it's too high the reaction reverses and the gel starts pumping the water back out to its surroundings. Fascinating, eh?

Dr. C, Tuesday, 7 May 2002 00:00 (twenty-one years ago) link

if you ate them you would shrunk down to the size of a perfectly mummified diatom

mark s, Tuesday, 7 May 2002 00:00 (twenty-one years ago) link

Mark S is quite correct here.

Another variant is dye-doped crystals which change colour according to their moisture content. If they've gone pink, bake the sachet in the oven until they've gone blue again, and their magickal drying properties will be restored.

Michael Jones, Tuesday, 7 May 2002 00:00 (twenty-one years ago) link

They're practically cabin buddies with any big bag of rice crackers.

And just how would you know, M. MacDonald? Took a quick nibble to taste, did ya?;>

Nichole Graham, Tuesday, 7 May 2002 00:00 (twenty-one years ago) link

five years pass...

I kinda hate silica gel.

jel --, Monday, 21 April 2008 17:14 (sixteen years ago) link

they warned you not to eat it

Alex in Baltimore, Monday, 21 April 2008 17:15 (sixteen years ago) link

DESSICANT

It sounds so filthy!

Abbott, Monday, 21 April 2008 17:44 (sixteen years ago) link

hahaha xpost

banriquit, Monday, 21 April 2008 17:44 (sixteen years ago) link

http://www.geekandproud.net/images/ipodshuffle.jpg

kenan, Monday, 21 April 2008 21:40 (sixteen years ago) link

eating the silica packet is a bad bad idea... ask this guy:

http://www.worldpress.org/images/121104_YushchenkoBeforeAfte.jpg

kenan, Monday, 21 April 2008 21:50 (sixteen years ago) link

How do you feel about silica jel?

libcrypt, Monday, 21 April 2008 21:50 (sixteen years ago) link

i aksed this thread title in science class when i was 9 -- teacher didn't know.

banriquit, Monday, 21 April 2008 21:52 (sixteen years ago) link

Ask for a refund.

libcrypt, Monday, 21 April 2008 21:52 (sixteen years ago) link


Q: What happens if you eat one of those silica gel packets that come in the pepperoni you ordered online, your Jimmy Choos, or your new leather coat?

A: We’re not sure why you would, but if you’ve eaten one by mistake, you’ll likely be fine. According to Mike Yudizky, a recently retired paramedic and the public health educator at the North Texas Poison Control Center, “It’s nothing more than a type of sand. Despite the big-time warnings, it’s completely nontoxic.” Even if you were to eat a shoebox full of packets, the only result would be “an upset tummy. But the same would happen if you drank too much water.”

The grains of what looks like clear caviar in the tiny packets are a desiccant. That is, they absorb moisture. You find them in food products that will have a longer shelf life if they stay dry. That could include pepperoni, dried nuts and fruits, or vitamins.

So why do the packets include warnings, occasionally including a skull and crossbones? To avoid product liability cases, says Yudizky. The packets are “harmful if swallowed by an infant or pet, as they could choke or aspirate on the silicon gel packet,” explains Michelle Musallam, a certified physician’s assistant in Dallas, Texas.

In some cases, the stuff is coated with a moisture indicator such as cobalt (II) chloride, a toxic substance that may be carcinogenic. But Yudizky says even that wouldn’t be a problem because of the incredibly small amount involved.

libcrypt, Monday, 21 April 2008 22:00 (sixteen years ago) link

So... can someone eat one and report back?

S-, Tuesday, 22 April 2008 00:11 (sixteen years ago) link

http://www.joblo.com/images_arrownews/SourFace2.JPG

Ned Trifle II, Tuesday, 22 April 2008 09:16 (sixteen years ago) link

Do Not Eat
AGELESS

RabiesAngentleman, Tuesday, 22 April 2008 13:05 (sixteen years ago) link

"Famous quotes" now appearing on packets of silica gel in yr nbd:

http://img236.imageshack.us/img236/3677/photo6od4.jpg

libcrypt, Tuesday, 22 April 2008 19:49 (sixteen years ago) link

sarcastic silica

latebloomer, Tuesday, 22 April 2008 19:50 (sixteen years ago) link

made from basilica

JTS, Tuesday, 22 April 2008 20:07 (sixteen years ago) link

Everything I need to know about silicones, I learned from this excellent album:

http://blog.wfmu.org/freeform/2007/02/365_days_50_gen.html

polyphonic, Tuesday, 22 April 2008 20:09 (sixteen years ago) link

four weeks pass...

Just poured big packet of silica gel into a cup and then barely covered it with water. It started popping like popcorn!!!! Couple bits got into my hair even.

libcrypt, Tuesday, 20 May 2008 17:18 (fifteen years ago) link

You must be really bored!

ENBB, Tuesday, 20 May 2008 17:21 (fifteen years ago) link

WTG!

kenan, Tuesday, 20 May 2008 17:22 (fifteen years ago) link

I like your impromptu science experiment!

Abbott, Tuesday, 20 May 2008 17:23 (fifteen years ago) link

I read an interesting article yesterday about eveolution of disposable diapers and the chemical contents that allow them to hold tons of pee (the industry calls it "insults"!). I thought it was pretty interesting.

The old, paper-filled diaper could hold, at most, two hundred and seventy-five millilitres of fluid, or a little more than a cup. Today, a diaper full of superabsorbent polymer can handle as much as five hundred millilitres, almost twice that. The chief characteristic of the Mills diaper was its simplicity: the insult fell directly into the core. But the presence of the polymer has made the diaper far more complex. It takes longer for the polymer than it does paper to fully absorb an insult, for instance. So another component was added, the acquisition layer, between the liner and the core. The acquisition layer acts like blotting paper, holding the insult while the core slowly does its work, and distributing the fluid over its full length.

Abbott, Tuesday, 20 May 2008 17:26 (fifteen years ago) link

^^^ Reading that, I almost insulted myself.

snoball, Tuesday, 20 May 2008 17:34 (fifteen years ago) link

bahahaha

Abbott, Tuesday, 20 May 2008 17:35 (fifteen years ago) link

"Taking the insult" takes on a whole complex of meanings now.

libcrypt, Tuesday, 20 May 2008 17:43 (fifteen years ago) link

Yeah, I am bored. Whenevs I am in lalaland, it's 95% boredom. Printing out network docs on the 3-foot-wide-paper plotter now.

libcrypt, Tuesday, 20 May 2008 17:44 (fifteen years ago) link

Update: 30 min later, the "gel" still hasn't absorbed all the insult, er, water.

libcrypt, Tuesday, 20 May 2008 17:50 (fifteen years ago) link

^^^ It's a well known fact that insults are acidic. Maybe that affects the absorbency, so try adding some lemon juice to the water?

snoball, Tuesday, 20 May 2008 17:57 (fifteen years ago) link

An insult that isn't acidic is more of a playful taunt.

kenan, Tuesday, 20 May 2008 18:02 (fifteen years ago) link

Considering dipping a couple purity balls in the sol'n b/c of lack of lemons.

libcrypt, Tuesday, 20 May 2008 18:05 (fifteen years ago) link

Update: Wet silica gel has a very faint odor of like new book or something.

libcrypt, Tuesday, 20 May 2008 18:19 (fifteen years ago) link

I've done the "sachet of silica gel + drops of water" thing several times now. Never fails to amuse.

Scik Mouthy, Tuesday, 20 May 2008 19:16 (fifteen years ago) link

An insult that isn't acidic is more of a playful taunt.

And you have to drink tons of water to get there.

Abbott, Tuesday, 20 May 2008 19:17 (fifteen years ago) link

Whoa what did I do there?

Abbott, Tuesday, 20 May 2008 19:17 (fifteen years ago) link

I don't know, but you have my attention.

kenan, Tuesday, 20 May 2008 19:19 (fifteen years ago) link

I've got a bunch of these in water right now and they aren't doing a damn thing.

Where have I gone wrong? I want some kitchen science here. Either that or I am disproving some above hypothesis and we'll have to duke it out in peer review.

Abbott, Friday, 23 May 2008 20:12 (fifteen years ago) link

Abbott, you must be even more bored than me.

Oilyrags, Friday, 23 May 2008 20:13 (fifteen years ago) link

How much water? I poured in too much at first, myself.

libcrypt, Friday, 23 May 2008 20:15 (fifteen years ago) link

Like a half cup (4 oz) maybe.

Abbott, Friday, 23 May 2008 20:21 (fifteen years ago) link

Oh man, Oily, I don't do things because I'm bored. I do things because I'm EXCITABLE. (I wish I did things when bored, like chores; then my house would be clean.)

Abbott, Friday, 23 May 2008 20:21 (fifteen years ago) link

You just need a TINY bit of water, like literally a tiny tiny tiny drop for a sachet.

Scik Mouthy, Saturday, 24 May 2008 08:09 (fifteen years ago) link

My guitar controller for Guitar Hero III came with a couple of packets of Silica Gel.

jel --, Saturday, 24 May 2008 10:07 (fifteen years ago) link

twelve years pass...

https://waskstudio.com/products/sealed-fate-candy-packets

Fuck the NRA (ulysses), Tuesday, 29 September 2020 03:37 (three years ago) link

Eh. So much stuff is shipped in cargo containers across oceans, where the air is notoriously damp (and sometimes those containers are stored right on the deck where waves can break over the rails), that those silica gel packets are cheap insurance that the contents will mostly arrive in good shape.

the unappreciated charisma of cows (Aimless), Tuesday, 29 September 2020 03:53 (three years ago) link

I like them. As I reside in a humid swamp, internal mold is a real risk to expensive things like camera lenses, so they and other things (my backup HDs) get stored in an airtight containers with silica. Others have been used to prevent internal condensation in things like underwater casings. While I've bought the little packets in bulk, any of them can be restored to perfectly dry condition by boiling off trapped water in an oven. 250 F for 30 minutes will do if you're not dealing with huge amounts.

Voulez-vous un coup d'etat, ce soir? (Sanpaku), Tuesday, 29 September 2020 07:20 (three years ago) link

http://files.explosm.net/comics/Rob/pepperoni.png

Stoop Crone (Trayce), Tuesday, 29 September 2020 08:15 (three years ago) link

Thats from 2007 and it was the first thing I thought of seeing this thread haha.

Stoop Crone (Trayce), Tuesday, 29 September 2020 08:16 (three years ago) link


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