56-75-7 Chloramphenicol 2,2-dichloro-n-[2-hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl)ethyl]acetamide
Product Name: chloramphenicol
Appearance : White or slightly yellowish white fine crystalline powder or needles
Cas No.: 56-75-7
Form: White or slightly yellowish white
Purity: >99%
Molecular weight:323.1294
Item |
Standard |
Test Result |
Description |
white or yellohreen needle, long-flake crystal or powder |
Conforms |
white needle-like crystals or elongated plates |
||
Identification |
The reaction is positive |
The reaction is postitive |
Melting poin |
149 ~ 153°C |
150°C |
Assay |
98.5 ~ 102% |
99.90% |
Loss on drying |
≤0.5% |
0.20% |
Residuc on ignition |
≤0.1% |
0.07% |
PH |
5.0 ~ 7.5 |
6.9 |
Specific rotation |
+18.5 ~ +20 ° |
+19.6° |
Heavy metals |
≤0.001% |
0.0005% |
Related substances |
The any secondary spot ≤0.5% |
<0.5% |
total≤0.2% |
Total <2% |
|
Chloride |
≤0.005% |
0.00% |
Crystallinity |
Meets the requirements |
Conforms |
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