Many people think that potassium hydroxide and caustic soda are the same product, but they are not. They're the same in some places, they're both very basic. Not to confuse these areas, here's a quick overview.
Physical properties of caustic soda:
Pure product is colorless transparent crystal, relative density 2.130, melting point 318.4℃, boiling point 1390℃. The caustic soda on the market has solid caustic soda and liquid caustic soda two kinds: pure solid caustic soda white, block, flake, rod, granular and brittle character; Pure liquid caustic soda is colorless transparent liquid, solid caustic soda hygroscopicity is strong, soluble in water, heat release when dissolved, aqueous solution is alkaline, greasy; Soluble in ethanol and glycerin; Insoluble in acetone and ether. It is highly corrosive to fiber, skin, glass, ceramics, etc. Hydrogen is produced by reaction with aluminum and zinc, boron and silicon. Disproportionation reaction with chlorine, bromine, iodine and other halogens; It neutralizes with acids to form salts and water.
Physical properties of potassium hydroxide:
White rhexagon crystal, industrial products are white or light gray block or rod, relative density 2.044 (20℃), melting point 360.4℃, boiling point 1320-1324℃. Soluble in water, release a large amount of solution heat when dissolving, strong water absorption, can absorb water and dissolve in the air, absorb carbon dioxide gradually into potassium carbonate. Soluble in ethanol, slightly soluble in ether, strong alkaline, corrosive, similar to caustic soda properties.
Therefore, potassium hydroxide and caustic soda are similar in some properties and have roughly the same application fields. They cannot be used in their respective industries. Therefore, users should judge whether the product meets their requirements according to its own characteristics when purchasing.
In analytical chemistry, caustic soda and potassium hydroxide are often used interchangeably. However, in some applications the two cannot be used interchangeably, such as hydrogen generators and specifying potassium hydroxide. For medical alkali lime, caustic soda is specified. Caustic soda is more hygroscopic than potassium hydroxide, so potassium hydroxide is often used in chemical analysis. Similarly, caustic soda should also be used as a desiccant. For example, the medicinal alkali lime you say is designated caustic soda, but the price of two caustic soda is relatively cheap, and caustic soda needs to be replaced.
Potassium hydroxide and caustic soda are highly corrosive, whether it is the use or preservation of time to be careful, abide by the correct code of operation, more content to come here www.hnwlcs.com consultation!