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Technical Data Sheet
Spiramycin
Compound Information
Product Name:
Spiramycin
CAS No.:
8025-81-8
Molecular Formula:
C43H74N2O14
Molecular Weight:
843.05
Revision Date:
2026-04-15
Analytical Information
| Tests |
Specifications |
| Appearance |
Off-White Powder |
| Assay |
4565 IU / mg |
| Composition |
Spiramycin I : 88.8 %; Spiramycin II : 0.6 %; Spiramycin III : 2.3 %; Total Spiramycin I, II, III : 92 % |
| Melting Point |
126-128 °C |
| pH |
9.7 units at room temperature |
| Absorbance |
maxima at 232 to 234 nm |
| Specific Rotation |
- 82.2 ° |
| Heavy Metals |
≤ 20 ppm |
| Loss on Drying |
1.8 % |
| Sulfated Ash |
0.06 % |
| MS
|
Pass test |
| 1H NMR
|
Pass test |
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