This figure shows the chemical structures of nonoxynol-9 and C31G. A. Note the hydrophilic end with the hydroxyl ion at the extreme left; and the hydrophobic hydrocarbon-benzene complex. This property confers on this molecule the ability to complex with both hydrophilic (ionized) and hydrophobic molecules. The chemical formula and molecular mass of a single nonoxynol-9 molecule are respectively C33H60O10 and 616.823 g/mol. B. C31G is a 1:1 mixed Micelle of Alkyl dimethyl amine oxide and Alkyl dimethylglycine (betaine).