subsecret
Hazard to Others
Posts: 424
Registered: 8-6-2013
Location: NW SC, USA
Member Is Offline
Mood: Human Sadness - Julian Casablancas & the Voidz
|
|
OTC Calcium Chloride - Good for Drying
I found this at my local hardware store, in the pool section: HTH Calcium Plus. The entire container cost me about $7. I heated about 5 grams of it in
a crucible until most of it had melted, and figured out that the mass had not changed much. The MSDS says that it contains several percent water, so
heating it in an oven would be a good idea before use. The MSDS lists it as 90-95% CaCl2, and it comes in the form of small prills, about
1-2 mm in diameter.
Fear is what you get when caution wasn't enough.
|
|
Texium
Administrator
Posts: 4598
Registered: 11-1-2014
Location: Salt Lake City
Member Is Offline
Mood: PhD candidate!
|
|
I've found that anhydrous calcium chloride can also be purchased at the hardware store in the cleaning supplies area, used for drying out damp areas.
I can't remember the brand name, but the stuff I found was in a sealed blue plastic bag. It's in the form of nice white prills that look quite pure.
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
Slap it onto a hotplate. Heat it a lot.
It will end up as a white cake that you have to scrape off of the plate.
Not exactly anhydrous, but damned close.
|
|
subsecret
Hazard to Others
Posts: 424
Registered: 8-6-2013
Location: NW SC, USA
Member Is Offline
Mood: Human Sadness - Julian Casablancas & the Voidz
|
|
@zts16: I believe that it's sold as Damp-Rid. I've seen paper cartons and plastic cups of this stuff.
Fear is what you get when caution wasn't enough.
|
|
Bert
Super Administrator
Posts: 2821
Registered: 12-3-2004
Member Is Offline
Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
|
|
Quote: Originally posted by aga | Slap it onto a hotplate. Heat it a lot.
It will end up as a white cake that you have to scrape off of the plate.
Not exactly anhydrous, but damned close.
|
Or microwave it in a casserole-
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
|
|
macckone
Dispenser of practical lab wisdom
Posts: 2168
Registered: 1-3-2013
Location: Over a mile high
Member Is Offline
Mood: Electrical
|
|
If you live in a cold climate, Qik Joe Ice Melt is basically calcium chloride with a few other chlorides as contaminants. Specifically, sodium
chloride, potassium chloride and strontium chloride.
|
|
CaptainPike
Hazard to Self
Posts: 68
Registered: 21-12-2012
Member Is Offline
Mood: No Mood
|
|
I have baked the cheap stuff that comes in the huge bag from Walmart (or at every convenience store, these days) in the kitchen oven, along with other
desiccants such as magnesium sulfate and a copper salt used to kill roots. The latter being especially handy when appropriate, since it will turn a
nice blue when it encounters water – just like sending a probe down below the cloudy atmosphere of a hostile planet and receiving it back data from
the invisible depths below.
With the calcium chloride, I didn't see much physical change in the prills, or beads really, even after having been subjected to 525°F for at least a
half an hour. Whereas the sulfates mentioned both powdered up, with the cupric one additionally losing almost all of its brilliant blue hue.
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
I get the feeling that you need introducing to Jamie Oliver.
http://www.jamieoliver.com/recipes/beef-recipes/jools-s-favo...
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
I saw a couple of organic solvents go from cloudy to clear after adding anhydrous CaCl2, hopefully meaning that the remaining water was
sequestrated.
No change seen in the calcium chloride though, unless there's a LOT of water, in which case it turns to slush.
|
|
dermolotov
Hazard to Others
Posts: 114
Registered: 13-12-2014
Location: Toronto, Canada
Member Is Offline
Mood: Free
|
|
Yupp. This is what I recommend in lue of impure Magnesium Sulphate and others.
This I have found to interfere much less and dissolve completely in water with no insolubles. I just bake for 30 minutes on 425 on my $5 toaster oven.
As mentioned, bit becomes a hard cake that I scrape off and into a powder.
I get it from Wal-Mart
|
|
BobD1001
Hazard to Others
Posts: 182
Registered: 29-3-2013
Member Is Offline
Mood: No Mood
|
|
Here in Pennsylvania during the winter months you can find huge amount of pure calcium chloride (used to melt ice on walkways) for dirt cheap. A
couple hours before reading this post I bought a 50lb resealable bucket of pure calcium chloride (marketed as pure, I'm sure there are some impurities
and water content) for $19.99 at BJ's wholesale since we just had our first snowstorm. I will also use it as a desiccant when I dont want to use my
molecular sieves.
|
|