PEG 400 diricinoleate

PEG 400 (polyethylene glycol 400) is a low-molecular-weight grade of polyethylene glycol. It is a clear, colorless, viscous liquid. Due in part to its low toxicity, PEG 400 is widely used in a variety of pharmaceutical formulations. More recently, it has been used to make "E-Liquid" for Electronic Cigarettes (Personal Vaporizers).
PEG 400 is strongly hydrophilic. The partition coefficient of PEG 400 between hexane and water is 0.000015 (log), indicating that when PEG 400 is mixed with water and hexane, there are only 1.5 parts of PEG 400 in the hexane layer per 100,000 parts of PEG 400 in the water layer. PEG 400 is soluble in water, acetone, alcohols, benzene, glycerin, glycols, and aromatic hydrocarbons, and is slightly soluble in aliphatic hydrocarbons.