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Appearance
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A white crystals or crystalline powder
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Assay (on anhydrous basis)
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99.0-102.0%
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Identity (IR)
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To confirm the structure
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|
pH (5% solution in water)
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7.0 – 9.0
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|
Chloride (Cl)
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Max. 0.2%
|
|
Residue on ignition
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Max 0.2%
|
|
Heavy metal (as Pb)
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Max.0.001%
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Loss on drying (at 105°C; 4 hrs)
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Max 3.0%
|
|
Specific absorptivity A1%/1cm (0.001%, in buffer pH 7.0 at 234 nm)
|
620 – 640
|