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Description
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A white, crystalline powder or small, opaque, monoclinic crystals. It gradually forms sodium carbonate on heating in the dry state or in solution
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Identifications
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-
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Identification 'A'
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Passes test
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Identification 'B'
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Passes test
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Identification 'C'
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Passes test
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Appearance of solution
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Passes the test
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Arsenic
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NMT 2 ppm
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Calcium (Ca)
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Passes test
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Heavy metals
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NMT 5 ppm
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Iron
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NMT 20 ppm
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Carbonate
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The pH of freshly prepared solution S is not greater than 8.6
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Chlorides
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NMT 200 ppm
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Sulphates
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NMT 150 ppm
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Assay
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99.0 – 101.0%
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