质量等级 | 包装(采购量区间) | 价格 | 库存 |
---|---|---|---|
99% | 25kg | 面议 | 充足 |
99% | 10kg | 面议 | 充足 |
99% | 5kg | 面议 | 充足 |
99% | 1kg | 面议 | 充足 |
99% | 100g | 面议 | 充足 |
C9H15N3O2S
Test items | Standards |
Appearance |
White off-white powder |
Odor |
No special odour |
Purity(By Hplc) |
≥99% |
[a]3(c=1,H2O)Optical rotation |
≥(+)122° |
pH |
6.0-7.5 |
Melting point |
249-255℃ |
Loss on drying |
≤0.5% |
Solvent residue (ethanol) |
≤300mg/kg |
Heavy Metals |
≤10ppm |
Microbiology |
total number of bacterial colonies ≤100cfu/g |
Total moulds yeasts ≤10cfu/g | |
Heat-resistant coliforms not detectable | |
Staphylococcus aureus not detectable | |
Pseudomonas aeruginosa not detectable | |
Storage |
Store with seal away from light at 2~8℃, especially at-20℃ |