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Potassium Carbonate is White crystall powder.A basic fine potassium salt chemical material used in manufacture of optical giass, electronic tubes ,fertilizer decarbonization, pharmaceuticals , agricultural chemical, inorganic, dyes and pigments. Potassium carbonate is the primary component of potash and the more refined pearl ash or salts of tartar. Historically, pearl ash was created by baking potash in a kiln to remove impurities. The fine, white powder remaining was the pearl ash. The first patent issued by the US Patent Office was awarded to Samuel Hopkins in 1790 for an improved method of making potash and pearl ash.
In late 18th century North America, before the development of baking powder, pearl ash was used as a leavening agent in quick breads