CAS number: 79-57-2
Molecular formula: C22H26N2O8
molecular weight: 446.4504
Chemical structure:
Name of Product: | Oxytetracycline Dihydrate | |
Shelf Life: | 4 years | |
Specification: | BP2011 | |
Test Items | Specification | Results of Analysis |
Characters | Yellow crystalline powder | Conform |
Identification | A.Thin-layer chromatography results | Conform |
B.A deep red colour develops in sulfuric acid and it becomes yellow when being diluted with water | Conform | |
C.Reaction of chlorides | Conform | |
Ph | 4.5 to 7.5 | 5.5 |
Specific optical rotation | -203 to -216 | -210° |
Specific absorbance | 290 to 310 | 304 |
Light-absorbing impurities | 430nm≤0.25 | 0.12 |
490nm≤0.20 | 0.14 | |
Related substances | content of impurity peak meets the requirements | Conform |
Heavy metals (ppm) | ≤50 | <50 |
Water (%) | 6.0 to 9.0 | 7.5 |
Sulfated ash (%) | ≤0.5 | 0.1 |
Assay (%) | 95.0 to 102.0 | 97.2 |