The present invention relates to cefazolin sodium pentahydrate crystal and a method for assembly and preparation of the crystal molecule. The cefazolin sodium pentahydrate crystal molecule contains five water molecules, orthorhombic system, space group of C
222
(
1
), in which sodium ion is bonded to the cefazolin molecule with a coordinate bond. The method for assembly and preparation of cefazolin sodium pentahydrate crystal molecule are: adding a solvent to a reactor equipped with a jacket, adding cefazolin acid and a sodium salt, heating until the reaction solution is clear, stirring continuously, adjusting pH, upon the completion of the reaction, transferring the liquid into a jacketed crystallizer, adding crystal seeds or nucleating spontaneously, controlling cooling, slowly adding a antisolvent. The particle size of cefazolin sodium pentahydrate crystal according to the present invention is adjustable, and the distribution of particle size is concentrated, the product has good flowability, smooth surface, high crystallinity, good stability, and rapid dissolving rate.
本发明涉及头孢唑林
钠五
水合物晶体及其分子的组装和制备方法。头孢唑林
钠五
水合物晶体分子含有五个
水分子,正交晶系,空间群为C222(1),其中
钠离子与头孢唑林分子以配位键结合。头孢唑林
钠五
水合物晶体分子的组装和制备方法为:向带夹套的反应釜中加入溶剂,加入头孢唑林酸和钠盐,加热至反应溶液清澈,持续搅拌,调节pH值,反应完成后,将液体转移至带夹套的结晶器中,加入晶种或自发核化,控制冷却,缓慢加入抗溶剂。本发明的头孢唑林
钠五
水合物晶体的粒径可调,粒径分布集中,产品具有良好的流动性、平滑的表面、高结晶度、良好的稳定性和快速的溶解速度。