Magnesium Hydroxide
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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 bulky white powder.
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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 | |||
|
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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Appearance of Solution
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Solution should not be more intensely coloured than
reference solution BS3. |
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4
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Arsenic
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Not more than 4 ppm. | ||
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5
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Heavy Metals
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Not more than 2 ppm Pb.
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6
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Iron
|
Not more than 0.08%
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7
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Chloride
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Not more than 0.1%
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8
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Sulphate
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Not more than 0.5%
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9
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Calcium
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Not more than 1.5%
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10
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Soluble substance
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Not more than 1.0%
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11
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Substances insoluble in acetic acid
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Not more than 0.1%
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12
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Loss on ignition
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Between 30.0% and 32.5%
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13
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Assay
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Between 95.0% and 100.5%
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