Potassium Citrate
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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 |
White, granular crystals or a crystalline powder; odourless;
hygroscopic. |
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B
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Solubility |
Very soluble in water; soluble in glycerin; practically
insoluble in ethanol (95%). |
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2
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Identification
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A
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Reaction of Potassium salts | |||
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i
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Reaction A
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A yellow or orange-yellow precipitate should be formed
immediately. |
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ii
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Reaction B
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A white, crystalline precipitate should be formed.
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iii
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Reaction C
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A yellow, crystalline precipitate should be formed which
on ignition should leave a residue of potassium chloride and platinum. |
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B
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Reaction of Citrates | |||
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i
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Reaction A
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A white precipitate should be formed which should be
soluble in 6M acetic acid. |
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ii
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Reaction B
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A violet colour should be produced which should change
to violet-blue. |
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3
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Appearance of Solution
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Solution should be Clear and Colourless
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4
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Acidity or Alkalinity
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Not more than 0.2 ml of 0.1M hydrochloric acid or 0.1M sodium hydroxide should be required. |
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5
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Arsenic
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Not more than 2 ppm.
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6
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Heavy Metals
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Not more than 10 ppm.
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7
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Sodium
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Not more than 0.3%
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8
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Chloride
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Not more than 100 ppm.
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9
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Oxalate
(as anhy. oxalic acid) |
Not more than 300 ppm.
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10
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Sulphate
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Not more than 150 ppm.
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11
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Readily Carbonisable Substances
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The solution should not be more intensely coloured than
reference solution YS2 or GYS2. |
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12
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Water
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Between 4.0% and 7.0%
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13
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Assay
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Between 99.0% and 101.0%
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