Barium carbonate (BaCO3), also known as witherite, is a chemical compound used in rat poison, bricks, ceramic glazes and cement.
B 0036 (OTTO) Barium carbonate, 99.999% Cas no 513-77-9 - used in photographic paper manufacturing. B 0036 (OTTO) Barium carbonate, 99.999% Cas no 513-77-9 - used to produce the barium sulphate which gives the photographic paper its flat white appearance.