目的:研究羟苯乙酯在硫酸镁溶液(33％)防腐中的应用。方法:采用羟苯乙酯溶液(5％),趁热加入法。结果:按配制总量的 6‰(ml/ml)加入羟苯乙酯溶液(5％),不析出颗粒,达到了有效抑菌效果,可以用作硫酸镁溶液(33％)的防腐剂。结论:该方法简单易行,防腐效果确切。 Objective: To study the application of phenethyl ethyl acetate in the preservation of magnesium sulfate solution (33%). Methods: Hydroxy phenethyl ester solution (5%), hot added to the law. Results: The antibacterial effect was achieved by adding 6% (ml / ml) of ethyl p-hydroxybenzoate solution (5%) with no precipitation of particles. It could be used as preservative in magnesium sulfate solution (33%). Conclusion: This method is simple and easy to operate with the exact effect of preservative.