Green Cleaning Basics: Wait, What IS Baking Soda?
As a dedicated DIYer and a self-proclaimed aficionado of any and every homemade cleaning product out there, I have to say: I use a LOT of baking soda. To anyone who makes their own eco-friendly cleansers and cosmetics, you know that baking soda is your best friend. It's safe, neutral, edible,
Posted — UpdatedTurns out, it's really not as simple as it seems. NaHCO3, aka sodium bicarbonate, aka baking soda, is a chemical salt that occurs in its natural form as the mineral nahcolite. NaHCO3 is an amphoteric compound, which means it may react as an acid as well as a base, although in aqueous solution it is slightly alkaline. Also, other fancy chemistry words.
There are deposits of pure nahcolite which occur naturally in the Green River Formation, which spans a few states in the Central US. The Green River Basin alone houses a 200-billion ton nahcolite deposit -- enough to supply the entire world with baking soda for many hundreds of years.
These natural deposits at the Green River Basin are commercially mined by many companies. Some mine it directly from the ground and sell it as is, in its natural state. Other companies extract and then refine it, by heating it and treating it with chemicals (not necessarily bad ones, but chemicals nonetheless). Either way, mining results in a relatively low-impact, relatively environmentally-friendly product.
Baking soda can also be created through a series of chemical reactions known as the Solvay process. This method uses carbon dioxide, ammonia, and sodium chloride as the raw materials. Unfortunately, these are pollutants. The Solvay process has its issues, especially with disposal of toxic chemicals. Because of this, more and more producers are moving away from the Solvay process, towards mining and refining.