Commercial azelastine hydrochloride crystallizes in the monoclinic space group P21/n (#14) with a = 13.7844(5), b = 16.39920(14), c = 9.41231(22) Å, β = 97.5340(20)°, V = 2109.32(4) Å3, and Z = 4. The lattice parameters differ by −0.02, +0.04, and +0.04% from those in the previous determination (reflecting differences in the temperature and the sample source), and are more precise, from the use of synchrotron radiation. The experimental powder pattern is included in the Powder Diffraction File™ (PDF®) as entry 00-070-1219.

中文翻译：

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盐酸氮卓斯汀的粉末X射线衍射，C22H25ClN3O·Cl

商业盐酸氮卓斯汀在单斜空间群中结晶磷21/n（＃14）与一种= 13.7844(5),b= 16.39920(14),C= 9.41231(22) 埃，β= 97.5340(20)°,五= 2109.32(4) Å3， 和Z= 4. 晶格参数与之前的测定结果相差 -0.02、+0.04 和 +0.04%（反映温度和样品源的差异），并且由于使用同步加速器辐射而更加精确。实验粉末图案包含在 Powder Diffraction File™ 中（PDF®) 作为条目 00-070-1219。