Ethyl p-hydroxybenzoate was synthesized with phosphotungstic acid as catalyst. Factors influencing yield were discussed. The yiela under the optimum condition was 46.4%.

• 以磷钨酸为催化剂合成了时羟基苯甲酸乙酯，讨论了影响合成产率的各种因素，产率可达46．4%25。