Caustic soda is white crystal, with strong corrosion, soluble in water, and the solution can turn phenolphthalein into red. Caustic soda is a commonly used alkali, one of the most usually used products in lab. Caustic soda can absorb the water in the air easily, so it should be stored with seal.

The product shall be packed with clean, seamless and leak-proof poly-ethylene bag of 25 kg. They should be stored in cool dry place, and keep away from the fire source, and prevent the sunlight exposure and rain.