Specification:
| Appearance | White crystalline solid | Conform |
| Aroma | A cool, mint-like taste | Conform |
| Purity (%) | ≥99.0 | 99.5 |
| Acid value (KOH mg/g) | ≤1.0 | 0.1 |
| Melting point (℃) | 60-63 | 62 |
| Heavy metals(mg/kg) | ≤10 | 2.4 |
| As (mg/kg) | ≤3.0 | 0.1 |