ITEM | STANDARD |
Appearance | Colorless, transparent hexagonal or needlelike crystals |
Odor | Have the characteristic odor ofChinese natural menthol |
Purity (%) | ≥ 99.5 |
Melting point (℃) | 41.5 ~ 44.0 |
Solubility (25 ℃) | Melting 1 gram test sample into 5ml 90% alcohol |
Non- volatile matter (%) | ≤ 0.05 |
Specific rotation(25℃) | - 50° ~ - 49° |
Arsenic (As) | ≤ 3 mg/kg |
Lead (Pb) | ≤ 2 mg/ kg |
Mercury (Hg) | ≤ 1 mg/ kg |
Heavy Metals (as PB) | ≤ 10 mg/ kg |