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Product name: |
Methysergide Maleate |
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Empirical formula: |
C21H27N3O2 . C4H4O4 |
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Molecular weight: |
469.5 |
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CAS: |
[129-49-7] |
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Description: |
White to yellowish white or reddish white, crystalline powder. |
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Identity |
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IR: |
Complies |
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TLC: |
Complies |
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Specific rotation: |
35.0 to 45.0° |
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pH of the solution: |
3.4 to 4.7 |
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Loss on drying: |
NMT 7.0 % |
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Impurities |
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Methyl ergometrine by HPLC: |
NMT 1.0 % |
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Methysergidine by HPLC: |
NMT 0.5 % |
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Other individually: |
NMT 0.1 % |
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Total amount of impurities: |
NMT 2.0 % |
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Organic volatile impurity |
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Dichloromethane: |
NMT 100 ppm |
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Residual solvents |
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Ethanol: |
NMT 3,000 ppm |
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Methanol: |
NMT 1,000 ppm |
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Other individually: |
NMT 200 ppm |
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Assay |
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Recalculated on anhydrous basis: |
97.0 – 103.0 % |