pˌɑːlɪˈɑːksɪl θˈɜːɾi fˈaɪv kˈæstɚɹ ˈɔɪl, ɐ sˈɜːfæktənt ænd dᵻɹˈɪvətˌɪv ʌv kˈæstɚɹ ˈɔɪl wʌzðə sˈɑːljuːbɪlˌaɪzɪŋ ˈeɪdʒənt ɛksˈɪpiənt slˈæʃ ˈædᵻtˌɪv ʌv ˈɔːlθɪsˌɪn.
Polyoxyl 35 Castor Oil, a surfactant and derivative of castor oil) was the solubilizing agent (excipient / additive) of Althesin.