| 摘要 |
Disclosed are a novel crystal of piperacillin sodium which has diffraction angles of 3.7°, 5.5°, 7.3°, 11.6°, 14.5° and 18.0° and a novel crystal of piperacillin sodium which has diffraction angles of 5.6°, 7.8°, 12.3°, 15.5°, 17.5°, 23.3°, 24.8° and 28.5° expressed by 2? in the powder X-ray diffraction analysis. The crystals have excellent stability and solubility and a low water-absorbing property, is extremely easy to be handled in the production process for a medicinal substance and in the packing during the preparation process for a pharmaceutical product. A pharmaceutical preparation for injection comprising any one of the crystals is useful.
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