The invention provides an aqueous composition, which is prepared in an addition recovery test in such a manner that the recovery rate of isopropyl methylphenol is 90% to 110% and the amount of isopropyl methylphenol can be accurately quantified . An aqueous composition containing isopropylmethylphenol, a diol having 3 to 6 carbon atoms, and silicic anhydride.本發明提供一種水性組成物,於添加回收試驗中,以異丙基甲基苯酚的添加回收率為90%~110%且異丙基甲基苯酚的添加量可正確地定量的方式製備而成。一種水性組成物,含有異丙基甲基苯酚、碳數3~6的二醇及矽酸酐。