Quote Originally Posted by DarkroomExperimente View Post
so if this is more pure than the "washing soda" I've been using & bicarbonate is much more available....and heating for an hour in the oven is so easy...seems like a good alternative

will the anhydrous absorb water from the air and turn into the monohydrate?
Yes it will absorb water from the air so store it in a tightly sealed jar. I have found that canning (mason) jars work very well for storing chemicals. They are readily available, cheap and have a nice wide mouth.