| 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 |
-
|
| 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%
|