453g. Baking Soda is plain bicarbonate of soda, a top quality leavening agent, used in combination with acidic ingredients for baking. Our pure baking soda is made from the deposits of mineralized sodium bicarbonate. It is extracted by a simple water process that uses no chemicals. And like all of our gluten free products, it is produced in our 100% gluten free facility and subject to ELISA batch testing to ensure its purity.