???????????
|
|
??????????? ??
- ???
- 256-258 °C (dec.) (lit.)
- ?? ?
- 275°C
- ??
- 0.910 g/mL at 20 °C
- ???
- 1 mm Hg ( 220 °C)
- ???
- 54 °F
- ?? ??
- Store below +30°C.
- ???
- ??, ???, ??? ??? ? ???????? ?????.
- ?? ?? (pKa)
- pK1:18(25°C)
- ??? ??
- ??
- Specific Gravity
- 0.902
- ??
- ???? ?????
- ??????(pH)
- 13 (5g/l, H2O, 20℃)Hydrolysis
- ???
- ?? ??
- ??
- Moisture Sensitive
- Hydrolytic Sensitivity
- 7: reacts slowly with moisture/water
- BRN
- 3556712
- ???
- ?????? ?? ?? ???? ???? ??? ??? ? ??. ?, ?, ???? ????, ???, ????, ??, ?????? ???? ????.
- InChIKey
- LPNYRYFBWFDTMA-UHFFFAOYSA-N
- CAS ??????
- 865-47-4(CAS DataBase Reference)
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | F,C,Xi | ||
|---|---|---|---|
| ?? ???? ?? | 11-19-22-34-35-14-20-36/37-37 | ||
| ????? | 16-26-36/37/39-43-45-7/9-8-43A-33-27-29 | ||
| ????(UN No.) | UN 3274 3/PG 2 | ||
| WGK ?? | 1 | ||
| F ?????? | 10-21 | ||
| ?? ?? ?? | 483 °C | ||
| ?? ?? ?? | Flammable solid/Corrosive | ||
| TSCA | Yes | ||
| ?? ?? | 8 | ||
| ???? | I | ||
| HS ?? | 29051900 | ||
| ???? ?? | KE-24897 |
??????????? C??? ??, ??, ??
???
?? 3, ?? 2, ??? 1?? ? ???? ???/??? ??.
?, ??? ?? ??? ?? ??? ? ??.
???, ??? ??? ???? ??? ???? ??? ? ?? : ??? ? ??? ?? ???.
???? ??? ??? ?? ??? ??? ? ??.
??? ???? ??? ? ??.
????? ???? ??? ??? ??? ? ??.
?? ?? ??? ????? ??? ? ??.
??, ?? ? ??
????? ? ?? ??? ??? ????. ??? ???? ????? ??.????? ?? ?? ??? ???? ??? ??? ?
??? ??
white crystalline powder?? ??
Potassium tert-butoxide is an important kind of organic base with its alkalinity being stronger than potassium hydroxide. It is widely used in the condensation, rearrangement and ring opening reaction in organic production in the fields of chemical, pharmaceutical and pesticide.????
Potassium tert-butoxide is a flammable solid. It ignites on heating. Being very strongly basic, its reactions with acids are highly exothermic. Contact of solid powder with drops of sulfuric acid and vapors of acetic acid caused ignition after an induction period of 0.5 and 3 minutes, respectively (Manwaring 1973). Ignition occurs upon reactions with many common solvents of the type ketone, lower alcohols, esters, and halogenated hydrocarbons. Such solvents include acetone, methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, n-propanol, isopropanol, ethyl acetate, n-propyl formate, n-butyl acetate, chloroform, methylene chloride, carbon tetrachloride, epichlorohydrin, dimethyl carbonate, and diethyl sulfate (NFPA 1997).Purification Methods
It sublimes at 220o/1mm. The last traces of tert-BuOH are removed by heating at 150-160o/2mm for 1hour. It is best prepared afresh as likely impurities are tert-BuOH, KOH and K2CO3 depending on its exposure to air. Its solubility at 25-26o in hexane, toluene, Et2O, and THF is 0.27%, 2.27%, 4.34% and 25.0%, respectively. [Feuer et.al. J Am Chem Soc 78 4364, Doering & Urban J Am Chem Soc 78 5938 1956, Beilstein 1 IV 1612.]??????????? ?? ?? ? ???
???
?? ??
2,4-DICHLORO-5-NITROPYRIDINE
3,5-????-1-??-3-?
ETHYL 5-NITROBENZOFURAN-2-CARBOXYLATE
?????[5,4-B]???-3-???
1-???-4-???????
5-???????-2-????
2-(2-(Diphenylphosphino) ??) pyridine
1-(3-(4-AMINO-2,6-DICHLOROPHENOXY)PROPYL)PYRROLIDIN-2-ONE
Ethyl 2-oxocyclopentanecarboxylate
5-???????-2-?????
1-?????????
5-NITRO-2-HYDROXY-4-METHOXYPYRIDINE
4-NITRO-PYRIDIN-3-YLAMINE
2-(DIPHENYLPHOSPHINO)ETHYLTRIETHOXYSILANE
Epoprostenol
5-(2-ETHOXYPHENYL)-1-METHYL-3-N-PROPYL-1,6-DIHYDRO-7H-PYRAZOLO[4,3-D]-7-PYRIMIDINONE
5-???????-2-????
5-???-????-2-???????????
5-N-PROPYLURACIL
Stavudine
????
??7-???????-2-???????
4-???-2-?????-5-??
4-Morpholinophenylboronic acid
5-???????-2-?????,??????
9-??-3-nitrocarbazole
????????
4-???-8-????-5H-????[5,4-B]??
1-???-4-tert-??-?????-1-?
Sertraline hydrochloride
2-(????)?????
3-???-1,2-??????
?????-[??? 3-(3`,5`-?-t-??-4`-???????)???????]??
6-?????
?????-3-?????
???-2,3,6-????
1R-cis crysanthemic acid
4-???-4-(4-??????)???????
????
1-(3-Hydrazinylpropyl)pyrrolidin-2-one
??????????? ?? ??
???( 777)?? ??
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