Sodium Hydroxide Considerations

- Sep 28, 2019-

Protective equipment should be worn when contact with caustic soda in large quantities, and work clothes or work caps should be made of cotton or a suitable synthetic material. Operators must wear work clothes, masks, safety glasses, rubber gloves, rubber aprons, long rubber boots and other labor protection products. Neutral and hydrophobic ointments should be applied to the skin. When contacting flake or granular caustic soda, there should be ventilation in the workplace. The maximum allowable concentration in indoor air is China MAC 0.5 mg/m3 (calculated as NaOH), and American ACGIH TLVC 2 mg/m3. A hood-type powered air-filtered dust-proof respirator must be worn when it is exposed to dust. Wear an air respirator if necessary. Operators must be specially trained to strictly follow the operating procedures. Operators are advised to wear a hood-type electric air-filtered dust-proof respirator, rubber-resistant acid-base suit, and rubber-resistant acid-base gloves. Keep away from flammable and combustible materials. Avoid dust. Avoid contact with acids. Lightly load and unload during handling to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment. Empty containers may be harmful residues. When diluting or preparing a solution, add alkali to the water to avoid boiling and splashing. Wear protective glasses and gloves when handling spills, sweep up, slowly pour into a large amount of water, rinse the floor with water, and put the diluted sewage into the wastewater system. If the lye touches the skin, it can be washed with 5~10% magnesium sulfate solution; if it is splashed into the eyes, it should be washed with a large amount of boric acid aqueous solution immediately; when a small amount of food is eaten, use vinegar, 3~5% acetic acid or 5% dilute hydrochloric acid, and a large amount. Neutralize with orange juice or lemon juice, drink egg white, milk or vegetable oil and seek medical attention quickly. It is forbidden to induce vomiting and gastric lavage.

Solid sodium hydroxide can be tightly packed in a 0.5 mm thick steel drum with a net weight of no more than 100 kg per barrel; a full or open glass drum outside a plastic bag or a two-layer kraft paper bag; a threaded glass bottle and an iron cap Ordinary wooden boxes outside glass bottles, plastic bottles or metal drums (cans); threaded glass bottles, plastic bottles or tinned steel drums (cans) full of bottom plate boxes, fiberboard boxes or plywood boxes; tinned steel drums Corrugated boxes (cans), metal drums (cans), plastic bottles or metal hoses. Packaging containers should be complete and sealed and should have a distinctive "corrosive" mark. When transported by rail, steel drums can be transported by open-air vehicles. The packaging should be complete at the time of shipment and the loading should be secure. During transportation, ensure that the container does not leak, does not collapse, does not fall, does not damage, moisture and rain. If the packaging container is found to be rusted, cracked, holed, melted, etc., it should be replaced immediately or shipped early. The container can be repaired by soldering. It is strictly forbidden to mix and transport with flammable materials or combustibles, acids, food chemicals, etc. Transport vehicles should be equipped with leakage emergency handling equipment when transporting. Do not store and mix with combustibles and acids. In case of fire, water, sand and various fire extinguishers can be used for fire fighting, but firefighters should pay attention to the corrosiveness of the water after it is dissolved in caustic soda.