Also known as "Bicarbonate of Soda," this is the mild-mannered cousin of soda crystals.
Both substances are alkali, but soda crystals are strong enough to oxidize aluminum. If used on aluminum pots or sinks, they can turn the metal dark grey or black and cause pitting. Baking soda is generally safer for aluminum but should still be rinsed promptly. soda crystals baking soda
A common point of confusion is when to swap one for the other. Here is the golden rule: Also known as "Bicarbonate of Soda," this is