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