| abstract |
Disclosed are a crystal form of (6S)-5-methyltetrahydrofolate salt and a method for preparing the same. The crystal form is: Form C of the crystal form of (6S)-5-methyltetrahydrofolate calcium salt, where the X-ray diffraction pattern has diffraction peaks at the 2.theta. angles of 6.3~0.2 and 19.2~0.2; or the crystal form of (6S)-5-methyltetrahydrofolate strontium salt, where the X-ray diffraction pattern has diffraction peaks at the 2.theta. angles of 6.5~0.2 and 22.0~0.2. The crystal form of (6S)-5-methyltetrahydrofolate salt of the present invention has the advantages of excellent physicochemical properties, good stability, high purity, good reproducibility, and being more suitable for production on an industrial scale. |