2,3-Benzopyridine(CAS NO 91-22-5)
Specification:
Item | Specification |
Molecular Formula | C9H7N |
Molecular Weight | 129.16 |
Density | 1.0929(20/4℃) |
Vapor density | 4.5(vs.air) |
Vapor pressure | 0.07mmHg(20℃) |
Flash point | 101℃ |
Boiling point | 238.05℃，114℃(2.27kPa) |
Melting point | -15.6 ℃ |
Refractive index | 1.62683 |
PH | 7.3(5g/l,H2O,20℃) |
CAS No. | 91-22-5 |
EINECS NO | 202-051-6 |
Traits | Soluble in hot water, insoluble in cold wate |
Preparation:
The content of 2,3-Benzopyridine in the washing oil is about 3%. To separate 2,3-Benzopyridine from the washing oil, just wash the 2,3-Benzopyridine fraction with sulfuric acid, and then neutralize with alkali,
to obtain industrial-grade quinoline. At present, the extraction of quinoline mainly uses sulfuric acid as an extractant. Although the effect is better, the indole oligomerization reaction under strong acid conditions results in the loss of indole. Using ammonium bisulfate as an extractant can avoid this problem.
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