Di Sodium Hydrogen Citrate
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SL. NO
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TESTS
|
STANDARDS
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|
1
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Characters
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|
A
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Description |
A white powder.
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B
|
Solubility |
Freely soluble in water; practically insoluble in ethanol
(96%). |
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2
|
Identification
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A
|
Reaction of Sodium salts | |||
|
i
|
Reaction A
|
A dense white precipitate should be formed.
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ii
|
Reaction B
|
No precipitate should be formed
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B
|
Reaction of Citrates | |||
|
i
|
Reaction A
|
A violet colour should be produced which should change
to violet-blue. |
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|
ii
|
Reaction B
|
A white precipitate should be formed which should be
soluble in 6M acetic acid. |
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|
3
|
Acidity
|
Between 4.9 and 5.2
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|
4
|
Arsenic
|
Not more than 2 ppm.
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5
|
Heavy Metals
|
Not more than 20 ppm.
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6
|
Chloride
|
Not more than 330 ppm.
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7
|
Oxalate (as anhy. oxalic acid)
|
Not more than 150 ppm.
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|
8
|
Sulphate
|
Not more than 0.12%
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|
9
|
Readily Carbonisable Substances
|
Not more than a pale brown colour should be produced.
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|
10
|
Assay
|
Between 98.00% and 104.00%
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