Crystalline form of ertapenem sodium and preparation method therefor
US9012628B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Dec 22, 2011 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Jan 7, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Provided is a crystalline form E of ertapenem sodium. Further provided is a method for preparing a crystalline form E of ertapenem sodium, characterized by using an aqueous ertapenem sodium solution at a low concentration as a raw material. The crystalline form E can be easily filtered and dried, the properties in the drying process are stable, and the purity of the crystal is high and can be up to 98.5% or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.