Payment: T/T, L/C Product Origin: China Shipping Port: Beijing/Shanghai/Hangzhou Order (MOQ): 1kg Lead Time: 3 working days Production capacity: 1000kg/month Storage condition: Stored in cool, dry place, room temperature. Package material: drum Package size: 1kg/drum, 5kg/drum, 10kg/drum, 25kg/drum| Test Items | Standard |
| Appearance | White crystalline powder |
| Assay | 99.5% min |
| Melting point | 198.5-201.5℃ |
| Clarity of water solution | Transparency, colorless, none suspended matters |
| PH value of 1% aqueous solution | 5-7 |
| Specific optical rotation | [α]D20=-66±2° |
| Arsenic | ≤2ppm |
| Hydroquinone | ≤10ppm |
| Heavy metal | ≤10ppm |
| Loss on drying | ≤0.5% |
| Ignition residue | ≤0.5% |
| Pathogen | Bacteria ≤300cfu/g |
| Fungus ≤100cfu/g |