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GLYCEROL Extra Pure Confirming to IP 1,2,3-Propanetriol; Glycerin
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Description
| Article No. | 00155 | Grade | Extra Pure |
| Purity | 98% | CAS No. | 56-81-5 |
| Molecular Formula | C3H8O3 | Molecular Weight | 92.09 |
| H.S. Code | 2905.4500 | Shelf Life | 60 Months |
Physical Properties
| Physical state at 20 °C | Liquid | Colour | Clear colorless | ||||
| Odour | Odorless | pH value | 5.5 – 8 | ||||
| Melting point/ Freezing point [°C] | 20 °C | Auto-ignition temperature [°C] | 370°C | ||||
| Flash point [°C] | 160 °C | Boiling point [°C] | 182 °C | ||||
| Vapour pressure mm/Hg | 0.0033 mm Hg at 50 °C | Vapour density | 3.18 | ||||
| Density [g/cm3] | 1.25 | Solubility in water [% weight] | Soluble in water | ||||
| Explosion limits -lower [%] | 0.90% | ||||||
Specifications
| 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% |
Revision Date:Â 16-May-2025
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