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Melatonin
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Molecular formula: C13H16N2O2
Molecular weight: 232.28
English name: Melatonin
CAS number: 73-31-4
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project
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standard
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experimental result
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differentiate
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Infrared or nuclear resonance
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conforms
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Loss on drying
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0.5% MAX
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0.26%
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Ignition residue
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0.5% MAX
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0.17%
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heavy metal
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10 ppm MAX
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符合規(guī)定
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single impurity
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0.1% MAX
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符合規(guī)定
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Total impurities
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1.0% MAX
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符合規(guī)定
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Assay
（TCL）
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≥99.0%
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≥99.0%
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Assay
（HPLC）
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≥99.0%
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99.57%
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melting point
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117～120℃
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118.3～118.5℃
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Conclusion: This product meets the requirementsBP2018/USP39
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