Product name | Menthol Crystals | ||
Items | Standards | Analytical Results | |
USP31 | BP2008 | ||
Identification | Colourless, transparent hexagonal or needlelike crystals. | Complies with standard | |
Melting point(℃) | 41~44℃ | About 43℃ | 42.7℃ |
Solubility | 1g soluble in 5ml of 90%(v/v) alcohol,forming a clear solution | Complies with standard | |
Specific rotation (25 ℃) | -45°~-51° | About -50° | -49.6° |
Limit of Nonvolatile residue (%) | Not overrun 0.05 under condition of 105 ℃ | 0.01 | |
Organic volatile impurities | Solvent-Use dimethyl sulfoxide | Meets the requirement | |
Chromatographic purity | The peak response due to menthol is not less than 97% | 99.65 | |
As Content | ≤3ppm | Absent | |
Heavy metals | ≤10ppm | Absent | |
Residue on ignition | ≤0.1% | 0.03% | |
Related substances | Examine by gas chromatography | Meets the requirement | |
Conclusion | Analytical results conforming to standard BP2008/USP31 |
Product name | Menthol Crystals | ||
Items | Standards | Analytical Results | |
USP31 | BP2008 | ||
Identification | Colourless, transparent hexagonal or needlelike crystals. | Complies with standard | |
Melting point(℃) | 41~44℃ | About 43℃ | 42.7℃ |
Solubility | 1g soluble in 5ml of 90%(v/v) alcohol,forming a clear solution | Complies with standard | |
Specific rotation (25 ℃) | -45°~-51° | About -50° | -49.6° |
Limit of Nonvolatile residue (%) | Not overrun 0.05 under condition of 105 ℃ | 0.01 | |
Organic volatile impurities | Solvent-Use dimethyl sulfoxide | Meets the requirement | |
Chromatographic purity | The peak response due to menthol is not less than 97% | 99.65 | |
As Content | ≤3ppm | Absent | |
Heavy metals | ≤10ppm | Absent | |
Residue on ignition | ≤0.1% | 0.03% | |
Related substances | Examine by gas chromatography | Meets the requirement | |
Conclusion | Analytical results conforming to standard BP2008/USP31 |