Caustic soda (Sodium hydroxide) Species: clean Name: Sodium hydroxide Synonyms: caustic soda Species: clean Purity: min. 98.5% Chemical formula: NaOH Characteristic Sodium hydroxide in solid form is a crystalline substance with a white color. It is hygroscopic and easily combines with carbon dioxide from the air (creating a coating of sodium carbonate). Keep it tightly closed. It dissolves very well in water and releases significant amounts of heat and creates a strongly caustic soda lye, an odorless, colorless, non-flammable liquid that reacts with acids, non-metal oxides and amphoteric hydroxides and forms sodium salts. It is slippery to touch and causes burns. It works corrosively on metals, especially in the presence of moisture. It reacts easily with metals possessing amphoteric properties, emitting hydrogen (eg with aluminum and zirconium, respectively forming clay and zirconates). It forms salts with weak organic acids (e.g. phenols and nitromethane). Under the influence of NaOH, non-metals are disproportionate (eg white phosphorus boiled with NaOH solution gives phosphorus and phosphate, and sulfur dissolves in NaOH solution forming sulphide and sulphite). Application • the basic component of preparations that make sewage pipes unclog, • soap production, • production of water glass from silica, • production of detergents and dyes, • production of artificial silk, • rubber production and rubber regeneration, • water treatment processes for industrial purposes, • refining of crude oil and mineral oils, • processing of liquid coking products, • paper industry, • as an acidity regulator. Effects on the human body Sodium hydroxide in the form of dust, steam or aerosol causes pain and watery eyes, burning sensation in the nose and throat, coughing, and a feeling of suffocation. Contamination of the skin causes pain, redness and even chemical burn with blisters and necrosis. Extensive skin contamination can cause shock or collapse. Contamination of the eyes with dust or solution destroys the eye protection apparatus, burns the eyeball, including the cornea and the deeper structures of the eye. Intestinal ingestion causes burns of the mucous membrane of the mouth, throat and other parts of the gastrointestinal tract with the risk of damage and perforation of the walls, hemorrhage, shock or death. In case of poisoning, oxygen and pyralgine are administered by inhalation with the following symptomatic treatment.Learn More
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