MR AZIDE - 13-7-2012 at 10:56
Another OTC chemical find: ( UK people)
This is a big tub of crystals that I saw In a hardware store today.
Its for refilling those plastic moisture absorbers, that you put in a space to dehumidify it.
http://www.wilkinsonplus.com/insulation/kilrock-refill-for-moisture-traps-1kg/invt/0135524/
I cant find an MSDS, but on the back of the tub ,it seems its mostly, if not all full of CaCl2 powder / crystals, according to what I read
on the back of the tub.
It can be bought in 1 and 2.5 Kg amounts.
Might be a nice easy access and cheap way of making freezing mixtures etc......
Hexavalent - 13-7-2012 at 11:53
I'm certain that this has been covered somewhere before.
How pure is the calcium chloride? Suitable for experiments, do you think?
MR AZIDE - 13-7-2012 at 12:00
Probably be OK for ice freezing mixtures, attaining a much lower temp than NaCl ice freezing mixtures.
Usefull for a dessicator/ drying agent.
I suppose if it is impure, it could be recrystallized, although it is very soluble.
We need an MSDS!!!!
Some moisture absorbers contain CaO.
Hexavalent - 13-7-2012 at 12:11
Dp us a favour; add some to liquid water. If it fizzes and reacts, then its probably calcium oxide. If it dissolves, and then a precipitate forms when
you add some sodium sulfate or carbonate solution then it's likely to be calcium chloride.
Pyro - 13-7-2012 at 15:26
i bought some of that stuff lately, it comes in prills that look a lot like calcium oxide, but when i break em in half there is just a thin crust of
powdery stuff, the rest is a crystal. it will be fine for drying substances. but I don't know about as a reagent