English name: Estrone
Molecular Formula:C18H22O2
Molecular Weight:270.3661
CAS Registry Number:53-16-7
EINECS:200-164-5
Quality:USP
Density:1.164g/cm3
Melting point:258-261°C
Boiling point:445.2°C at 760 mmHg
Refractive index:1.587
Flash point:189.7°C
Water solubility:0.03 g/L
Vapour Pressur:1.54E-08mmHg at 25°C
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ITEM
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SPECIFICATION
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Description
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White crystals or crystalline powder
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Identification
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A.B conform to standard
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Clarity of solution
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The solution is clear
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Specific rotation
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+158°~+165°
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Residue on ignition
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Not more than 0.5%
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Limit of equilenin and equilin
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According to USP29
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Ordinary impurities
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Meet the requirement of USP29
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Residual solvents
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Meet the requirement of USP29
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Loss on drying
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Not more than0.5%
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Assay
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97.0%~103.0%
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