Glycerol

Appearance (USP): Clear, colourless syrupy liquid; hygroscopic
Appearance (EP, BP): Colourless or almost colourless, syrupy liquid; very hygroscopic
Appearance (JP): A clear colourless and viscous liquid; hygroscopic
Appearance (IP): A clear colourless or almost colourless, syrupy liquid; veryhygroscopic
Solubility (USP): Insoluble in chloroform, in ether and in fixed and volatile oils. Miscible with water and with alcohol.
Solubility (EP, BP): Miscible with water and with ethanol (96%), slightly soluble in acetone, Practically insoluble in fatty oils in essential oil.
Solubility (JP): Miscible with water and with ethanol (99.5%)
Solubility (IP): Miscible with water and with ethanol (95%); slightly soluble in acetone; practically insoluble in ether and in fixed oils and volatile oils
Identification : FTIR (JP): Matches with the standard pattern
Identification A : FTIR (USP, IP): Matches with the standard pattern
Identification A : RI (EP, BP): 1.4700 - 1.4750
Identification B, System suitability : Resolution (GC) (USP): >= 1.5 between diethylene glycol & glycerin
Identification B : Diethylene glycol & ethylene glycol :
GC (USP): <= 0.10% (each for diethylene glycol & ethylene glycol is found)
Identification B : FTIR (EP, BP): Matches with the standard pattern
Identification B (IP): A blue ring develops at the interface of the two liquids. Allow to stand for 10 min., the blue colour does not diffuse into the two layer

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