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Also known as: Erythromycin Octadecanoate; Erythromycin Stearic Acid Salt; Bristamycin; Ethril
Erythromycin Stearate is the stearate salt form of Erythromycin, a macrolide antibiotic derived from Saccharopolyspora erythraea. It exerts its antibacterial activity by inhibiting bacterial protein synthesis through reversible binding to the 50S ribosomal subunit, thereby blocking the translocation step of peptide chain elongation. Mediocon Inc supplies pharmaceutical-grade Erythromycin Stearate conforming to IP / BP / EP / USP specifications.
The stearate salt form offers enhanced stability compared to Erythromycin Base, protecting the acid-labile macrolide from gastric degradation. It is absorbed in the upper small intestine and hydrolysed to free Erythromycin, delivering the same broad-spectrum antibacterial activity against Gram-positive organisms, atypical pathogens, and selected Gram-negative bacteria.
Key Features
Therapeutic Applications
Industrial & Formulation Uses
Why Choose Mediocon
| Parameter | Specification (BP/USP) |
|---|---|
| Assay (Erythromycin) | NLT 93.0% (dried basis) |
| Erythromycin A content | NLT 85.0% of total erythromycin |
| Loss on Drying | NMT 3.0% (60 °C, 3 h, in vacuo) |
| Specific Optical Rotation | −68° to −78° (c=1, ethanol) |
| Stearic Acid Content | NLT 32.0% and NMT 38.0% |
| Heavy Metals | NMT 20 ppm |
| Residue on Ignition | NMT 0.2% |
| Related Substances | Erythromycin B NMT 5.0%; C NMT 3.0% |
| Microbial Limits | Complies with pharmacopoeia |
| Identification | IR, HPLC Compliant |
| Mfg Date | MAR 2025 |
| Exp Date | FEB 2028 |
| Packing | 25 kg HDPE drums / aluminium foil bags / as per requirement |
Mediocon Inc is a GMP-certified API manufacturer and bulk pharmaceutical ingredient supplier based in Aurangabad, Maharashtra, India. We specialise in supplying Erythromycin Stearate (CAS 643-22-1) and over 1,000 other Active Pharmaceutical Ingredients, excipients, herbal extracts, and nutraceutical ingredients to pharmaceutical manufacturers worldwide.
Our Erythromycin Stearate is manufactured under strict quality management protocols compliant with WHO-GMP, ISO 9001:2015, and major pharmacopoeial standards (IP, BP, USP, EP). Every batch undergoes full analytical testing — identity (IR/HPLC), assay, related substances (Erythromycin A/B/C), residual solvents (ICH Q3C), heavy metals, and microbial limits — before release with a Certificate of Analysis.
Export Markets
Quality & Compliance