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Erythromycin Ethylsuccinate
| ITEMS | LIMIT |
| Description | White crystalline powder, hygroscopic Practically insoluble in water |
| Solubility | Freely soluble in acetone, chloroform, absolute ethanol and methanol |
| Identification | |
| IR | Meet |
| Water (K.Fischer) | Not more than 3.0% |
| Residue on Ignition | Not more than 1.0% |
| Erythromycin A enolether | Not more than 3.0% |
| Erythromycin N-ethylsuccinate | Not more thatn 3.0% |
| Assay (on dry basis) | |
| Erythromycin A | not less than 70.0% |
| Erythromycin B | not more than 12.0% |
| Erythromycin C | not more than 5.0% |
| Erythromycin A,B and C | not less than 76.5% |
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