Is bisulfate of soda vegan?

Bisulfate of soda, also known as sodium bisulfate or sodium hydrogen sulfate, is an acidic sodium salt used in the food industry as a pH regulator and preservative. It is manufactured industrially through chemical synthesis, typically by reacting sodium chloride with sulfuric acid at elevated temperatures, or as a byproduct during the manufacture of nitric acid.

Manufacturers add bisulfate of soda to a wide variety of foods, including commercial baked goods, beverages, sauces, dressings, and prepared potato products to lower acidity and prevent browning. It also functions as a leavening acid in certain chemical leavening mixtures for crackers and cakes, helping dough rise during baking.

This ingredient is classified as vegan because its production relies entirely on mineral and chemical origins. No animal-derived substances, tissues, or byproducts are used in its synthesis or purification, making it suitable for a plant-based diet.