Chiral mixture screening. Ten compounds were screened as HBAs, including L-menthol, thymol, choline chloride (ChCl), tetrabutylammonium chloride (TBACl), tetrabutylammonium bromide (TBAB), tetraethylammonium chloride (TEACl), tetrabutylphosphonium chloride (TBPCl), L-proline, citric acid, and (S)-2-acetoxypropionic acid, with 93 individual (mostly) chiral HBDs to determine which mixtures form chiral solvents below 55 and 20 °C. HBA-HBD mixtures were screened in molar ratios between 1:6-12:1 HBA:HBD, but most mixtures were only screened at 1:2, 1:1, 2:1, and 3:1 HBA:HBD. At the time of writing this manuscript 1393 mixtures, including all molar ratios, have been prepared and measured for liquid formation. Of these combinations, 576 mixtures were liquid at 55 °C and 392 of those were also liquid at 20 °C. All of the mixture screening data is contained in an accessible database. A small excerpt of the database showing the screening of L-menthol as HBA and L glutamic acid as HBD is presented in Table . Columns include mole ratios of HBA and HBD, names of the HBA and HBD, SMILES structure representation of the HBA and HBD, and columns indicating if the mixture was observed as a complete liquid (y), complete solid (n), or partial liquid (p) at 55 and 20 °C. The database is organized by the identity of the HBA. For example, all of the mixtures of ChCl and chiral HBDs are grouped together in the database.