5,5-???????
5,5-??????? ??
???
174-177 °C (lit.)
?? ?
237.54°C (rough estimate)
??
1.2864 (rough estimate)
???
1.4730 (estimate)
???
193°C
?? ??
Sealed in dry,Room Temperature
???
H2 O: 0.1 g/mL ??? ???
?? ?? (pKa)
pKa 8.1 (Uncertain)
??? ??
??? ?? ?? ??
??
???? ?????
???
??
BRN
2827
Henry's Law Constant
3.5×103 mol/(m3 Pa) at 25℃, HSDB (2015)
??? ?? ??
?? ????
InChI
1S/C5H8N2O2/c1-5(2)3(8)6-4(9)7-5/h1-2H3,(H2,6,7,8,9)
InChIKey
YIROYDNZEPTFOL-UHFFFAOYSA-N
SMILES
CC1(C)NC(=O)NC1=O
LogP
-0.480
CAS ??????
77-71-4(CAS DataBase Reference)
NIST
2,4-Imidazolidinedione, 5,5-dimethyl-(77-71-4)
EPA
5,5-Dimethylhydantoin (77-71-4)
??
?? ? ?? ??
?? ? ???? ?? (GHS)
????(GHS):
?? ?:
Warning
??·?? ??:
??
??·?? ??
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??
?? ?
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P- ??
H302 ??? ???
?? ?? ?? - ??
?? 4
??
P264, P270, P301+P312, P330, P501
H317 ????? ?? ??? ??? ? ??
?? ??? ??
?? 1
??
P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
??????:
P280 ????/???/???/?????? ?????.
NFPA 704
5,5-??????? C??? ??, ??, ??
??? ??
white to off-white crystals or crystalline powder
??
5,5-Dimethylhydantoin is part of a group of hydantoin compounds that are being evaluated for their anticonvulsant and central nervous system antitumour properties.
Purification Methods
Crystallise the hydantoin from EtOH and sublime it in vacuo. [Beilstein 24 III/IV 1097.]
5,5-??????? ?? ?? ? ???
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5,5-??????? ?? ??
???( 525)?? ??
Americas 1
Belgium 3
Canada 1
China 405
Czech Republic 1
Europe 5
Germany 13
India 26
Italy 1
Japan 7
Poland 1
Slovakia 1
South Korea 1
Switzerland 2
The Netherlands 1
Ukraine 1
United Kingdom 14
United States 41
Global 525
