|
Appearance
|
A clear, colourless or almost colourless, syrupy liquid; hygroscopic
|
|
Solubility
|
Miscible with water and with ethanol (95%), slightly soluble in acetone, practically insoluble in ether and in fixed oils and volatile oils.
|
|
Assay (on anhydrous basis)
|
98.0-101.0%
|
|
Identifications
|
-
|
|
Identification 'A' ( by IR)
|
The absorption maxima in the spectrum obtained with the sample corresponds in position & relative intensity to those in the spectrum obtained with Glycerin reference standard / working standard or with the reference spectrum of Glycerin
|
|
Identification 'B'
|
Refractive index - 1.470 to 1.475
|
|
Identification 'C'
|
Relative density - 1.258 to 1.268
|
|
Appearance of solution
|
Solution A is clear, Solution is colourless (10 mL of solution A--> 25 mL with water)
|
|
Acidity or alkalinity
|
Solution is colourless and not more than 0.2 mL of 0.1 M sodium hydroxide is required to produce a pink colour
|
|
Chlorides
|
Max 0.0025%
|
|
Aldehydes
|
Max 0.001%
|
|
Ester
|
Not less than 8.0 mL of 0.1 M hydrochloric acid is required to decolourise the solution
|
|
Halogenated compounds
|
Max 0.0035%
|
|
Ethlylene glycol, diethylene glycol and related substances
|
-
|
|
Ethylene glycol (GC)
|
Max 0.1%
|
|
Diethylene glycol (GC)
|
Max 0.1%
|
|
Any other secondary impurity
|
Max 0.1%
|
|
Sum of all impurities
|
Max 1.0%
|
|
Sugars
|
The solution is clear blue. The solution remains blue and no precipitate is formed on further heating for 5mins.
|
|
Heavy metals
|
Max 0.0005%
|
|
Sulphated ash
|
Max 0.01%
|
|
Water
|
Max 2.0%
|