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Introduction of MELATONIN:
| Item | Specification | Results |
Assay(MELATONIN 99% by HPLC) | ≥ 99.0 % | 99.45% |
Appearance | A white or pale-white crystalline powder, odorless | Complies |
Loss on drying | 0.5%MAX | 0.17% |
Identification | Positive reaction | Complies |
Residue on ignition | 0.1%MAX | 0.07% |
Melting point | 117~120°C | 118~119.5°C |
Heavy metal | 10ppm MAX | Complies |
Clarity and degree of opalescence of liquids | 1% ethanol and chloroform solution | Complies |
Particle size | 80-120 mesh | Conforms |
Individual | 0.5% MAX | 0.2% |
| Total | 1.0% MAX | 0.42% |
| Yeast & mold | <100/ g | Conforms |
| E.coil | Negative | Negative |
| Salmonelia | Negative | Negative |
top quality Melatonin 99%