Jiayi powder's critical humidity (CRH) is higher than the anhydrous glucose and so on other supplementary materials, is 加益粉的临界湿度（CRH）高于无水葡萄糖等其他辅料，与乳糖相近，所以不易吸潮，生产及贮存过程可避免产品吸潮、结块、变色及由此引起的化学变化、保证了主药的稳定性。