Magnesium Hydroxide Paste
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SL. NO
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TESTS
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STANDARDS
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1
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Characters
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A
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Description |
A white, uniform suspension, which does not separate readily on standing.
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B
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Solubility |
Practically insoluble in water and in ethanol (95%). It dissolves in dilute acids.
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2
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Identification
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A
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Reaction of Magnesium salts | |||
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i
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Reaction A
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A white crystalline precipitate should be formed.
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ii
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Reaction B
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A bright red turbidity should develop which should gradually settle to give a bright red precipitate.
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3
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Soluble alkalis
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Not more than 1.0 ml of 0.05M sulphuric acid should be required.
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4
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Soluble salts
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The residue should not weigh more than 12 mg. | ||
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5
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Heavy Metals
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Not more than 4 ppm
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6
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Sulphate
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Not more than 0.2%
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7
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Microbial contamination
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Total microbial count, not more than 100 per ml;
1 g should be free from Escherichia coli. |
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8
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Assay
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Between 18.0% and 20.0%
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