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Product name : Melatonin Standard: USP40 Expiry date: 3 Years |
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Item |
Standard |
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Characteristics |
a white to off-white crystalline powder, slightly soluble in water, soluble in acetone, ethyl acetate and methanol |
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Identification |
IR |
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UV |
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HPLC |
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Particle size |
100% pass than 200μm(80mesh) |
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Chloride and sulfate |
0.02%MAX |
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Loss on drying |
1.0% MAX |
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Residue on ignition |
0.1%MAX |
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Heavy metals |
Pb |
1ppmMAX |
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As |
1.5 ppmMAX |
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Hg |
1.5 ppmMAX |
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Cd |
0.5 ppmMAX |
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Impurities |
Individual impurity |
0.1%MAX |
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Total impurity |
1.0%MAX |
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Assay (on the dried basis ) |
98.5-101.5%MIN |
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Conclusion |
Comply with the requirements of USP40 |
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