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Description
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Colourless crystals or a white, crystalline powder
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Identification
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It gives the reaction of chlorides and ammonia salts
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Appearance of solution
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10% w/v sample solution is clear & colorless
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pH (5% solution)
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Between 4.5 to 6.0
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Arsenic
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Less than 4 ppm
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Heavy metals
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Less than 10 ppm
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Iron
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Less than 20 ppm
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Calcium
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Less than 200 ppm
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Sulphates
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Less than 150 ppm
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Thiocyanate
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No red colour is produced
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Sulphated ash
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NMT 0.1%
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Loss on drying (at 105°C)
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NMT 1.0%
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Assay
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NLT 99.0% and NMT 100.5% of NH4Cl, calculated on dried basis
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