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Glycerine 98% (Extra Pure) - Specifications |
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Synonyms |
(Glycerol) Confirming to IP |
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Description |
A clear, colourless or almost colourless, odourless; very hydroscopic, syrupy liquid |
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Assay |
98.0 – 101.0% |
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Clarity (50% w/v in distilled water) |
Clear |
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Heavy metals (as Pb) |
Max. 0.0005% |
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Aldehyde and reducing substance |
To pass IP test |
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Solubility in water (% weight) |
Soluble in water |
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Colour (10ml of 50% w/v solution diluted to 25ml) |
Colorless |
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Refractive index |
1.470-1.475 |
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Acidity |
Max. 0.2 ml of 0.1N NaOH required for 50ml of 50% w/vsolution |
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Alkalinity |
Nil |
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Iron (Fe) |
Max. 0.0004% |
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Chloride (Cl) |
Max. 0.0025% |
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Sulphate (SO4) |
Max. 0.0030% |
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Aldehyde and reducing substance |
Passes test |
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Glycerine 99.5% (AR) - Specifications |
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Description |
Clear colourless viscous liquid |
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Assay (on anhydrous basis) |
Min.99.5% |
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Chloride (Cl) |
Max. 0.001% |
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Moisture |
Max. 0.5% |
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Individual impurities |
Max. 0.1% |
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Solubility in water (% weight) |
Soluble in water |
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color |
To pass USP test |
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Fatty acid and esters |
Max. 1.0ml of 0.5N NaOH consumed |
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Sulphate (SO4) |
Max. 0.002% |
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Chlorine compound |
Max. 0.003% |
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Residue on ignition |
Max. 0.01% |
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Specific Gravity at 25°C |
Min 1.249 |
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Total impurities (Chromatographic including Diethylene glycol) |
Max 1% |
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Individual impurities |
Max 0.1% |
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Melting point/Freezing point (° C) |
20° C |
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