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Appearance
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A white to very pale yellow crystalline powder or colourless crystals; odourless. On exposure to light it gradually darkens.
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Assay
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99.0 - 100.5%
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Specific rotation [a] 20°C/ D (10% solution)
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+20.5° to +21.5°
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Residue on ignition
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Max. 0.1%
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Heavy metal (as Pb)
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Max. 0.002%
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Iron (Fe)
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Max. 0.001%
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