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DESCRIPTION OF THE PRODUCT

Refined glycerine is clear, colourless, liquid and colourless very hygroscopic

SPECIFICATION REFINED GLYCERINE IP GRADE

S.No Specification Units Limits Result
1 Solubility Miscible with water and ethanol Miscible with water and ethanol
2 Identification A. It complies with the teat for refractive index 1.470 to 1.475 @ 20 0C 1.471
B. By IR: The infra-red absorption spectrum of the resulting solution is concordant with the reference spectrum of glycerol (85%) The sample spectrum should be concordant with that of working standard spectrum
C. A blue ring develops at the interface of the liquids. A blue ring develops at the interface of the liquids.
D. Vapours are evolved which blacken filter paper impregnated with alkaline potassium tetraiodomercurate solution. Vapours are evolved which blacken filter paper impregnated with alkaline potassium tetraiodomercurate solution.
3 Acidity or alkalinity ml Not more than 0.2 ml of 0.1 m NaOH is required to change the color of the indicator to pink Nill
4 Appearance of solution Clear viscous liquid Clear viscous liquid
5 Heavy Metal PPM Not more than 5 ppm Nill
6 Iron PPM Not more than 4 ppm Nill
7 Chlorides PPM Not more than 25 ppm 4.8
8 Sulphates PPM Not more than 25 ppm 4.1
9 Aldehydes and reducing substances Any colour produced is not more than standard PASS
10 Ester ml Not less than 8 ml of 0.1 HCL is required to decolorize 8.3
11 Suger Precipitate is produced PASS
12 Sulphated ash % Not more than 0.01 0.002
13 Water % Not more than 2 w/w 0.13
14 Assay % Not less than 98% to not more than 101% of glycerine 99.84
16 Ethylene glycol, Diethylene glycol and related substances % Not more than 0.5 Absent