Potassium tert-butoxide is an organic compound with the formula C4H9OK, is an important organic base, more basic than potassium hydroxide3)3As a strong base, Potassium tert-butoxide is widely used in chemical, pharmaceutical, pesticide and other organic synthesis, such as ester exchange, condensation, rearrangement, polymerization, ring opening and preparation of heavy metal orthoesters.
Molecular weight: 112.212
Chemical formula: C4H9OK
Density: 0.910 g/cm3
Metal hair: add metal potassium into the newly added resin-butanol in nitrogen environment, keep the temperature for 1 h after the reflux nail is completely dissolved, really hang, evaporate the excess resin-butanol, and dry the remaining white solid in oil bath at 180 ~ 190℃ under vacuum and reduced pressure for more than 10h to obtain the crystal powder of potassium resin-butanol, which shall be stored and used under nitrogen, and shall not be in contact with air moisture, otherwise it will turn pink. The yield is calculated by potassium, and the content is more than 99%.
Safety information: Potassium tert-butoxide is soluble in tert-butanol and is often used for dehydrohalogenation of halogenated hydrocarbons. Its solution is stable. It can be prepared by reacting tert-butanol with potassium metal and then evaporating tert-butanol under reduced pressure. Strongly alkaline condensing agent, its alkalinity is strong with sodium methoxide and sodium ethoxide.
Widely used in organic synthesis of condensation, rearrangement and ring-opening reactions, generally used in tert-butyl alcohol solution. It is an organic alkaline corrosive, strong hygroscopic, should be sealed storage, in storage and transportation pay attention to fire prevention, sun protection and should be stored in a cool, ventilated and dry place.
Basic information:
Alias: Potassium tert-butoxide solution
Molecular Formula: C4H9KO
Molecular weight: 112.21
Potassium tert-butoxide has two types: liquid and solid. Usually, the liquid industrial product is the tert-butyl alcohol solution of potassium tert-butoxide, which is light yellow or milky white and slightly turbid, in which the potassium content of potassium tert-butoxide is 10%~12%; The solid product is generally white or off-white powder, in which the content of Potassium tert-butoxide is 95%~97%.
Potassium tert-butoxide is an organic alkaline corrosive product with strong moisture absorption, and should be stored in a sealed place, generally stored in a cool, dry and ventilated warehouse. It should be kept away from heat sources, isolated from kindling and prevented from being exposed to sunlight. Potassium tert-butoxide is highly corrosive to skin. During loading, unloading and handling, operators should wear protective masks to prevent being burned by potassium tert-butoxide.
Physicochemical properties
Appearance Property：White or off-white hygroscopic powder, water reactive, humidity sensitive, nitrogen protected.
Solubility: soluble in tert-butanol
Melting point: 256-258 ℃
Boiling point: 275℃
Flash Point: 54℉
Vapor pressure: 1 mm Hg ( 220 ℃)
Uses
1, used in pesticides, medicine, printing and dyeing, catalyst, etc
2. As a strong base, it is widely used in condensation, rearrangement and ring opening reactions in organic synthesis such as chemical industry, medicine and pesticide.
