Physical Properties
Physical state at 20 °C
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Solid
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Colour
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Colorless crystals
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Melting point/ Freezing point [°C]
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224 - 225 °C
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Solubility in water [% weight]
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Soluble in water
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Specifications
Assay (by acidimetry) Min 99.5%Water 7 - 8.5%Sulfated ash Max 0.2%Appearance White to off white powderSubstance insoluble in Passes testwaterSuitability (as indicator) Passes testSensitivity test for Iron Passes test(II)