Monooleoylglycerol, also known as glyceryl 1-oleate, glycerylmonooleate or 1-monoolein, is classified as a member of the 1-monoacylglycerols. 1-Monoacylglycerols are monoacylglycerols containing a glycerol acylated at the 1-position. Glycerolmonooleate is considered to be practically insoluble (in water) and relatively neutral. Glycerolmonooleate is an yellow to amber liquid at room temperature, biodegradable and can be used as a water-in-oil emulsifier, pigment dispersant, lubricant, and spreading agent.