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Oxytetracycline Oxytetracycline hydrochloride 79-57-2
CAS 79-57-2
Oxytetracycline
High purity
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Items |
Standard |
Result |
Characteristics |
A yellow crystalline powder |
A yellow crystalline powder |
Identification |
Positive |
Positive |
PH |
4.5 ~ 7.5 |
5.5 |
Heavy metals |
≤ 50 PPM |
< 50 PPM |
Specific optical rotation |
-203°~-216° |
-210° |
absorbance |
290~310 |
305 |
Light-absorbing impurities |
430nm ≤0.25 |
0.08 |
490nm ≤0.20 |
0.01 |
|
Related substance |
4-epioxytetracyclin≤0.5% |
0.04% |
Other impurity≤0.1% |
Undetected |
|
Total impurities≤3.0% |
1.7% |
|
Sulphated ash |
≤0.5% |
0.11% |
Water |
6.0%~9.0% |
7.4% |
Assay |
95.0%~102.0% |
99.1% |
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