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5,5-Dimethylhydantoin Structure

5,5-Dimethylhydantoin

Chemical Properties

Melting point 174-177 °C (lit.)
Boiling point 237.54°C (rough estimate)
Density  1.2864 (rough estimate)
refractive index  1.4730 (estimate)
Flash point 193°C
storage temp.  Sealed in dry,Room Temperature
solubility  H2O: 0.1 g/mL hot, clear
pka pKa 8.1 (Uncertain)
form  Crystalline Powder or Crystals
color  White to off-white
Water Solubility  soluble
BRN  2827
LogP -0.480
CAS DataBase Reference 77-71-4(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII 34032MQ9RO
NIST Chemistry Reference 2,4-Imidazolidinedione, 5,5-dimethyl-(77-71-4)
EPA Substance Registry System 5,5-Dimethylhydantoin (77-71-4)
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Safety

Symbol(GHS) GHS hazard pictograms
Signal wordWarning
Hazard statements H302-H317
Precautionary statements P280
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  22-24/25-36/37-26
WGK Germany  2
RTECS  MU0977000
TSCA  Yes
HS Code  29332100
Hazardous Substances Data 77-71-4(Hazardous Substances Data)
Toxicity LD50 oral in rabbit: 12660mg/kg
NFPA 704:
0
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