| Items | Specification |
| Appearance | Yellow powder |
| Purity (GC) | 99.0% min |
| Identification | Reservation time as reference standard |
| Melting point | 48.5~51.5 ℃ |
| Ignition residue | 0.1% max |
| Water | 1.0% max |
| Single impurity | 0.5% max |
| Loss on drying | 0.5% max |
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