PPG12-Buteth16, PPG-9-Buteth12, PPG-26-Buteth-26, and PPG-28-Buteth-35 are polyoxypropylene, polyoxyethylene ethers of butyl alcohol that function as hair conditioning agents, miscellaneous skin conditioning agents, surfactant/emulsifying agents. In addition, PEG-12-Buteth-16 is used as a solvent in cosmetic formulations. This latter ingredient is used at concentrations up to 31% in hair groomi...