Potassium hydroxide, also known as caustic potash, caustic soda and potassium ash, is a common chemical product with white powder or flake solid appearance. It is often seen in industry or laboratory. However, potassium hydroxide is a dangerous chemical with strong alkalinity and corrosiveness, which can also cause human poisoning.
Strong alkalinity and corrosiveness: it can burn when contacting with skin, dissolve protein and form basic denatured protein. Solution or dust splashed on the skin, especially on the mucous membrane, can produce soft scabs. The higher the solution concentration, the higher the temperature and the stronger the effect. Splashing into the eyes can not only damage the cornea, but also damage the deep tissues of the eyes.
If contact happens accidentally when we use it, we should quickly carry out self rescue measures: prevent touching the skin and eyes during work, if it is touched in time, wash the damaged part with running water, and then wet 5% acetic acid, tartaric acid, hydrochloric acid or citric acid solution; if it splashes into the eyes, wash it carefully and slowly with running water or physiological saline for 10-30 minutes, and then point in 2% novocaine or 0.5 %Dicaine solution. During operation, workers shall wear work clothes made of strong cloth, rubber gloves, sleeves, apron, rubber shoes and other labor protection appliances, and apply neutral and hydrophobic ointment on their hands.
Toxicity: a small amount of long-term inhalation will cause lung damage, and its acute toxicity is ld50273mg / kg (rat oral). Therefore, it is necessary to avoid engaging in potassium hydroxide related work for a long time, pay attention to wear corresponding protective equipment and try to avoid ingestion. If you don't eat it carefully, rinse your mouth with water immediately and drink milk or egg white. If you are serious, see a doctor immediately.
Because potassium hydroxide can also pollute water body, which has the risk of explosion, in case of leakage accident, it is necessary to immediately isolate the leakage pollution area and restrict access. It is recommended that the emergency treatment personnel wear dust mask (full mask) and acid and alkali resistant work clothes. Do not touch the leakage directly. Small leakage: collect in dry, clean and covered container with clean shovel. It can also be washed with a large amount of water, and then diluted into the waste water system. Large amount of leakage: collected and recovered or transported to the waste disposal site for disposal.