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ALPHA-PYRONE

ALPHA-PYRONE ??? ???
?? ??:
504-31-4
???:
ALPHA-PYRONE
???(??):
2H-PYRAN-2-ONE;2-Pyrone;Coumalin;α-Pyron;cumalin;-Pyrone;α-pyrone;α-Pyrone;2-Pyranone;pyran-2-one
CBNumber:
CB6766803
???:
C5H4O2
??? ??:
96.08
MOL ??:
504-31-4.mol
MSDS ??:
SDS

ALPHA-PYRONE ??

???
8-9 °C
?? ?
102-103 °C20 mm Hg(lit.)
??
1.197 g/mL at 25 °C(lit.)
???
n20/D 1.53(lit.)
???
94 °C
?? ??
2-8°C
??? ??
??
??
??? ????? ????
??
Pleasant hay-like, herbaceous-warm odor
BRN
1511
LogP
-0.645 (est)
??
  • ?? ? ?? ??
  • ?? ? ???? ?? (GHS)
????? 23-24/25
WGK ?? 3
F ?????? 8-9-23
HS ?? 29322090
????(GHS): GHS hazard pictograms
?? ?: Warning
??·?? ??:
?? ??·?? ?? ?? ?? ?? ?? ? ?? ?? P- ??
H302 ??? ??? ?? ?? ?? - ?? ?? 4 ?? GHS hazard pictograms P264, P270, P301+P312, P330, P501
H315 ??? ??? ??? ????? ?? ????? ?? 2 ?? GHS hazard pictograms P264, P280, P302+P352, P321,P332+P313, P362
H319 ?? ?? ??? ??? ?? ? ?? ?? ??? ?? ?? 2A ?? GHS hazard pictograms P264, P280, P305+P351+P338,P337+P313P
H335 ?? ???? ??? ? ?? ?? ???? ?? - 1? ??;???? ?? ?? 3 ?? GHS hazard pictograms
??????:
P261 ??·?·??·???·??·...·????? ??? ????.
P301+P312 ??? ???? ??? ????(??)? ??? ????.
P302+P352 ??? ??? ??? ?? ????.
P304+P340 ???? ??? ??? ?? ??? ??? ???? ?? ??? ??? ????.
P305+P351+P338 ?? ??? ? ?? ?? ???? ????. ???? ?????? ?????. ?? ????.
NFPA 704
1
0 0

ALPHA-PYRONE C??? ??, ??, ??

??? ??

clear yellow to brown liquid.
Polymerizes easily upon standing, particularly under alkaline conditions. Very slightly soluble in water, soluble in alcohol and oils.

?? ??

2H-Pyran-2-one (a-Pyrone) is a heterocyclic building block. Photochemistry of 2H-pyran-2-one has been investigated by laser flash photolysis with infrared detection. Ketene and a bicyclic lactone were obtained as major photoproducts.

Purification Methods

Dissolve -pyrone in Et2O, wash it with brine, dry (Na2SO4), f

ALPHA-PYRONE ?? ?? ? ???

???

?? ??

NSC 263484 5-BROMO-2H-PYRAN-2-ONE,95% Phosphonic acid, P,P'-1,2-phenylenebis-, P,P,P',P'-tetraethyl ester

ALPHA-PYRONE ?? ??

???( 116)?? ??
??? ?? ??? ?? ?? ? ??
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ALPHA-PYRONE ?? ??:

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