Granular caustic soda, also known as pearl caustic soda, is a solid caustic soda (sodium hydroxide) product with a chemical formula of sodium hydroxide. It can be divided into two types based on particle size: coarse and fine. The fine particle size is about 0.7mm, and its shape is similar to laundry detergent.
In solid alkali, flake alkali and granular alkali are common and used solid bases, and granular alkali is better than flake alkali. However, the preparation process of granular alkali is more difficult and complex than that of flake alkali. Therefore, the price of granular alkali is naturally higher than that of flake alkali.
Granular alkali is prone to deliquescence and reacts with carbon dioxide, so the storage of solid alkali generally requires drying and sealing.
Granular caustic soda is a solid sodium hydroxide with the chemical properties of sodium hydroxide. When placed in the air, it absorbs moisture from the air, deliquests, and deteriorates with carbon dioxide. It is also required to be dry and sealed in the packaging. In China, granular caustic soda is generally packaged in 25kg three-layer plastic woven bags.
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