Weight: 16 Ounces (1 Pound) Purity: 99+% Pure Grade: Reagent/Food Grade Texture: Fine Powder CAS Number: 497-19-8 You are buying 16 Ounces (by weight) of Sodium Carbonate Anhydrous. The item is in TWO 8 Fluid Ounce (by volume) Polypropylene bottles. Sodium Carbonate Anhydrous (Na2CO3); also known as Soda Crystals / Soda Ash / Washing Soda; has hundreds of uses. Bottles are made of sturdy polypropylene. The square, “space-saver” shape ensures that the bottles fit snugly on a shelf. The wide mouth makes for easy dispensing and stackability. To ensure a spill-free journey, the screw tops are heat sealed and the bottles are sealed in plastic.