səlˈuːʃənz ʌv hˈaɪdɹədʒən tɹaɪˈɑːksaɪd ɪn dˈaɪəθaɪl ˈiːθɚ kæn biː sˈeɪfli stˈoːɹd æt mˈaɪnəs twˈɛnti dᵻɡɹˈiːz sˈiː fɔːɹ æz lˈɔŋ æz ɐ wˈiːk.
Solutions of hydrogen trioxide in diethyl ether can be safely stored at −20 °C for as long as a week.