Appearance and properties: soft colorless powder

Density: 1.2g / cm3

Melting point: 138-140ºC

Boiling point: 818.4ºC at 760mmHg

Flash point: 448.8ºC

Stability: stable at normal temperature and pressure

Storage conditions: 0-6ºC

Vapor pressure: 4.94E-31mmHg at 25 ° C

This product is a macrolide antibiotic, made from the culture solution of Actinomycete Streptomyces erythreus isolated on the soil of Panay Island of Fibbing. It was first published by EliLilly in 1952. Several analogs such as erythromycin B and C are produced in the culture solution at the same time, and their differences in the solubility of the solvent are used to remove them. This product is white or light yellow-white crystalline powder, odorless, bitter, hygroscopic in air, easily soluble in ethanol, chloroform, acetone and ether, slightly soluble in water. The solubility increases after salt formation. It is more stable in a dry state, the aqueous solution is more stable under refrigeration, and the titer gradually decreases at room temperature. It is unstable in case of acid, stable in the case of slightly alkaline, and its titer is significantly reduced below pH 4. MP 135-140 ° C (decomposition), specific rotation -70-78 ° (2%, ethanol solution).