$2.99 on Amazon…
Seems weird to be so much more expensive, but that one has a different type of lid, and a different UPC code.
Our inventory is coming from a different ASIN/SKU and different cost. I’ll ask the team to take a look at it though.
$1.29 at my local Meijer
The cheaper one also seems to be labeled as something to put in your refrigerator to absorb odors where the more expensive one is not, might be different grades of baking soda.
Baking soda is baking soda. (Sodium bicarbonate – I can’t write the chemical formula because I’m not sure how to do a subscript on my Gboard, but it’s simply sodium, carbon, and oxygen.) Possibly the container is airtight and can then be used to refill with the cheap stuff. In any case I’ve never heard of different grades of baking soda.
I found it an intriguing question, though. 
Here we go with 3D stereochemistry modeling
I guess the question is whether there is such a thing as chemical purity grade (which is a thing for quantitative chemistry labs) for consumption in e.g., baking or as a dentifrice vs. odor absorber in refrigerator. Arm & Hammer says there is no chemical difference.
Clabber Girl brand (which I bought three cans of from Woot last month) makes both baking soda and baking powder. Baking powder includes baking soda as well as cornstarch:
Google Search text string: “substitute for baking soda cream of tartar”
Submitted to Google Search Feedback:
“As a confirmed minimalist I keep my cooking building blocks to a minimum. I was looking for a concise way to phrase what I wanted to put in my reply but as you can see, I’m running into some trouble and because it’s the weekend, I’m going to put it off until a weekday. My attempt to submit a meaningful reply is already becoming so complicated I don’t think I could finish it today unless I was stoned.”
While this is correct, I recall having a box that looked like the one I usually purchased, but after baking something that did not come out correctly I looked carefully at the labeling and it was one made specifically for fridge (not sure they still do that, it was decades ago).
When I called them to ask why I could not bake with it, I was told that it was a much coarser texture and may not dissolve the way it needed to for baking.
Yeah, I used to call the companies and bug them with all kinds of questions. Like why a baking mix in my cupboard said it required 1/2 cup water but the new one of exact same thing said to use 1/3 cup, despite the product weight being the same 
Just trying to be helpful and help clarify
- Unlike Arm & Hammer, the Clabbergirl brand makes both baking soda and baking powder.
- The potential confusion - their cans are very similar in appearance so one does need to be careful when ordering that they are getting what they intended.
Mistakenly using baking soda instead of baking powder in a cake typically results in a flat, dense, and metallic or soapy tasting cake!
Instead of pound cake you may get soapy tasting pancakes
I just bought a 16oz box of baking soda at Aldi for 89 cents. It would take some fancy talking from Clabber Girl to get me to spend way more for a smaller quantity. Like, if it made my cakes taste like they were made by Julia Child herself, maybe (but only maybe).
Baking soda is the wrong ingredient to concentrate on for that 
…
Exactly. That’s why I keep cream of tartar in my pantry – so I can mix my own baking powder from baking soda mixed with cream of tartar.
I use baking powder very rarely 
and so I sometimes find it to be dead as a doornail 
but I always have fresh baking soda around, in addition to which cream of tartar keeps for years under my particular storage conditions.
[I’m a minimalist and I’m now down to attritioning everything down to almost nothing again.]
[
I can’t find yet what you originally wrote to me; I’m still looking for it. Someone sent me a chemical diagram of baking soda and I’m determined to find the post. In the meantime, here is what I started to write way back then:
By the way, we are in good company. See attached.]
So it’s a 2-D representation of 3-D? [I also wonder if you changed your screen name; I get confused easily. I could change my username but then nobody would know my name.]
Anyway, it’s the weekend so attached is the only chemical diagram I care about today. (It has oxygen for me and carbon for my plants. 
)
Yes a 2D representation of the stereochemistry of Sodium Bicarbonate.
Not sure why you think my pseudonym changed It has not in a decade here. Aside from the emoji. But my avatar changed from original yuk issue to Adorabilis Octopus
I thought it only because you threw the same type of chemistry at me that someone else used to do. Keeps me on my toes. 