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Description
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Small, colourless crystals, usually needles-like, with a cooling, saline, bitter test
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Solubility
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Very soluble in boiling water, freely soluble in water, freely (and slowly) soluble in glycerin; sparingly soluble in alcohol
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Identification
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-
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Identification 'A'
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Sulfate - Meets the requirements
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Identification 'B'
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By Assay -The retention time of the major peak of the Sample solution should corresponds to that of the Standard solution, as obtained in the Assay
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Assay (As MgSO4)
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98.0%–102.0% (on the previously ignited basis)
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Chloride and sulfate (Chloride)
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NMT 0.014%
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Iron
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NMT 0.5 µg/g
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Selenium (Se)
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NMT 30 ug/g
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Specific tests
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-
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pH
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5.0-9.2
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Loss on ignition
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40.0 to 52.0% (For Heptahydrate)
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