Melatonin is a substance excreted by the pineal body. It is widely exist in prokaryote,monad,fungi,plants,invertebrate and vertebrate. Main technical index:[Appearance]White or similar to white crystal powder [Identification]Positive reaction [Melting point]116-120°C [Drying loss]≤0.5% [Residue on ignition]≤0.5%
[Heavy metals]≤10ppm
[Assay] ≥99.0%
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