China ISO/GMP Natural Menthol Crystal[CAS No 89-78-1], Find details about China Natural, Menthol from ISO/GMP Natural Menthol Crystal[CAS No 89-78-1]
Items | Standards |
Appearance | Colourless ,transparent hexagonal or needlelike crystals. |
Melting point(ºC) | 41-44ºC |
Solubility | 1 g soluble in 5ml of 90%(v/v)alcohol. Forming a clear solution |
Specific rotation | -45°~-51° |
Limit of nonvolatile residue | Not overrun 0.05% under condition of 105ºC |
Organic volatile impurities | Solvent -use dimethyl sulfoxide |
Chromatographic purity | The peak response due to menthol is Not less than 97% |
As content | ≤3ppm |
Loss on dry | ≤0.05% |
Heavy metals | ≤10 ppm |
Residue on evaporation | ≤0.05% |
Related substances | Examine by gas chromatography |
Residue on ignition | ≤0.1% |