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Name Estradiol
CAS 57-91-0
EINECS(EC#) 200-023-8
Molecular Formula C18H24O2
MDL Number MFCD00064144
Molecular Weight 272.38
MOL File 57-91-0.mol

Chemical Properties

Melting point  176-180 °C(lit.)
alpha  D20 +53 to +56° (c = 0.9 in dioxane)
Boiling point  355.44°C (rough estimate)
density  1.0708 (rough estimate)
refractive index  1.4800 (estimate)
storage temp.  0-6°C
solubility  ethanol: 50 mg/mL, clear, colorless
form  powder
pka 10.27±0.60(Predicted)
color  white with slight yellow cast
Water Solubility  3.9mg/L(25 ºC)
Merck  13,3738
CAS DataBase Reference 57-91-0(CAS DataBase Reference)
NIST Chemistry Reference Estra-1,3,5(10)-triene-3,17alpha-diol(57-91-0)
EPA Substance Registry System Estra-1,3,5(10)-triene-3,17-diol, (17.alpha.)- (57-91-0)

Safety Data

Hazard Codes  T,Xn
Risk Statements 
R45:May cause cancer.
R48:Danger of serious damage to health by prolonged exposure.
R40:Limited evidence of a carcinogenic effect.
Safety Statements 
S53:Avoid exposure-obtain special instruction before use .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S24/25:Avoid contact with skin and eyes .
S22:Do not breathe dust .
RIDADR  UN 2811 6.1/PG 2
WGK Germany  3
RTECS  KG3750000
HS Code  29372390

Hazard Information

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