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Imidazole Structure

Imidazole

Chemical Properties

Melting point 88-91 °C(lit.)
Boiling point 256 °C(lit.)
Density  1.01 g/mL at 20 °C
vapor pressure  <1 mm Hg ( 20 °C)
refractive index  1.4801
Flash point 293 °F
storage temp.  Store below +30°C.
solubility  H2O: 0.1 M at 20 °C, clear, colorless
form  crystalline
pka 6.953(at 25℃)
Specific Gravity 1.03
color  white
Odor Amine like
PH Range 9.5 - 11
PH 9.5-11.0 (25℃, 50mg/mL in H2O)
Water Solubility  633 g/L (20 ºC)
Sensitive  Hygroscopic
λmax λ: 260 nm Amax: 0.10
λ: 280 nm Amax: 0.10
Merck  14,4912
BRN  103853
Dielectric constant 23.0(Ambient)
Stability Stable. Incompatible with acids, strong oxidizing agents. Protect from moisture.
InChIKey RAXXELZNTBOGNW-UHFFFAOYSA-N
LogP -0.02 at 25℃
CAS DataBase Reference 288-32-4(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII 7GBN705NH1
NIST Chemistry Reference 1H-Imidazole(288-32-4)
EPA Substance Registry System Imidazole (288-32-4)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H302-H314-H360D
Precautionary statements P260-P280-P301+P312-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  C,Xi,T
Risk Statements  36/38-63-34-22-20/21/22-61
Safety Statements  26-36/37/39-45-22-36-27-53
RIDADR  UN 2923 8/PG 3
WGK Germany  1
RTECS  NI3325000
Autoignition Temperature 480 °C
TSCA  Yes
HazardClass  8
PackingGroup  III
HS Code  29332990
Hazardous Substances Data 288-32-4(Hazardous Substances Data)
Toxicity LD50 in mice (mg/kg): 610 i.p.; 1880 orally (Nishie)
NFPA 704:
1
3 0

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