MountainRoseHerbs.com, Brambleberry.com and Amazon.com sell citric acid, offering a variety of size options from 1 pound to 55 pound bags, as of June 2015. People use citric acid for cooking, canning, drying and freezing. It is also used in soaps, lotions, supplements and cleaning supplies.
MountainRoseHerbs.com sells citric acid in 1- to 55-pound bags that is imported from Austria. The company also offers aromatherapy products, teas and spices.
Brambleberry.com offers citric acid in three sizes: 1 pound, 10 pounds and 50 pounds, and it also sells additives, bases and oils.
Amazon.com allows customers to sort their search for citric acid by price and average customer rating. The company sells the product in supplement form as well as bagged.