Poloxamer 188 for injectable formulations has higher quality criteria than for oral formulations in average molecular weight, degree of unsaturation, limit of free ethylene oxide, propylene oxide, 1,4-dioxane and organic volatile impurities. 作为注射用辅料,泊洛沙姆188在平均分子量,不饱和度,以及游离EO、PO、二恶烷和有机挥发物上比口服辅料有更高的质量要求;